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Small military 6 yuan to buy 50 cents and 20 cents of stamps, ask these two kinds of stamps, 50 cents have______ Zhang, there are two corners______ Zhang
6 yuan = 60 Jiao,
（18×5-60）÷（5-2），
=30÷3，
=10,
18-10 = 8 (sheets);
A: there are 8 for 5 jiao and 10 for 2 jiao
So the answer is: 8; 10
Xiaolihua bought two kinds of stamps with the face value of 1 yuan and 2 yuan for 50 yuan. If the stamp with the face value of 2 yuan is less than the stamp with the face value of 1 yuan, there are 5 pieces less, So, how many stamps of these two denominations have been bought?
Fifteen stamps of two yuan, twenty pieces of one yuan, and X stamps of two yuan are X-5 sheets
2 times (X-5) + x times 1 = 50
2X-10+X=50
3x=60
X=20
If the stamp with a face value of 2 yuan is less than that of a stamp with a face value of 1 yuan, then How many stamps have you bought for each of the two denominations Column equivalence relation Determinant equation Equation of degree 1 with one variable
There are x stamps with a face value of $2
There are 50-2x stamps with a face value of 1 yuan
Then 50-2x-x = 5
X=15
15 yuan stamps and 20 1 yuan stamps
Xiao Ming bought 15 stamps of 50 Fen and 80 Fen, and spent 9 yuan. How many stamps did you buy each
Assuming that all are 80 points, 9 yuan = 900 points,
50 points: (15 × 80-1500) × (80-50),
=300÷30，
=10 (sheets);
80 points: 15-10 = 5 (sheets);
A: there are 5 with 80 points and 10 with 50 points
Xiao Ming bought 16 stamps with 80 Fen and 2 yuan, which cost 18 yuan and 8 Jiao. If he bought x stamps with 80 Fen, the equation () A. 80x+2（16-x）=188 B. 80x+2（16-x）=18.8 C. 0.8x+2（16-x）=18.8 D. 8x+2（16-x）=188
If there are x stamps with $2, 16-x stamps with 80 cents will be issued,
80 points = 0.8 yuan,
18 yuan and 8 Jiao = 18.8 yuan,
0.8x+2（16-x）=18.8，
Therefore, C
Xiaohua bought 16 stamps with 80 Fen and 2 yuan, and spent 18 yuan and 8 Jiao, then bought 80 Fen stamps______ 2 yuan stamps______ Pieces
If there are x stamps with $2, 16-x stamps with 80 cents will be issued,
80 points = 0.8 yuan,
18 yuan and 8 Jiao = 18.8 yuan,
2x+（16-x）×0.8=18.8，
2x+12.8-0.8x=18.8，
1.2x+12.8-12.8=18.8-12.8，
1.2x÷1.2=6÷1.2，
x=5；
16-5 = 11;
A: there are 11 80 Fen stamps and 5 2 yuan stamps
So the answer is: 11, 5
1. A student bought 6 stamps, of which x 1 yuan stamps and y 2 yuan stamps shared 10 yuan How many stamps are there for 1 yuan and 2 yuan? 2. A drop of ink was accidentally dropped on the exercise book, and an equation in the equation system was covered with a constant. The equation system was 5x-2y = 3 and - 2x-7y = (). So Xiao Ming saw the answer of the exercise book. The solution of the equation was x = 3, y = 6. He quickly made up the constant term. Can you work out the constant? 3. A company uses white iron sheet to make boxes. Each sheet of iron can produce 12 boxes or 18 box covers. With 7 pieces of iron sheets, how to arrange the number of iron sheets for box body and box cover so that the box body and box cover can be matched. X is the box body and y is the box cover -----------------------------------------------------------
1. 1 yuan for 2 pieces, 2 yuan for 4 pieces
2. The constant is - 48
3. 12x = 18 (7-x), x = 4.2
At present, there are some stamps of 50, 60, 80, 1 yuan, 2 yuan and 5 yuan. There are several schemes to take out 4 yuan
Eight five corners; five eight corners; four one yuan; two two two fifty cents plus five six sixes; two fifty cents plus three one yuan; two fifty cents plus one one two two yuan; two fifty cents plus one six dollar plus three eight eight cents; four fifty cents plus two one yuan; four five five corners plus one two two yuan; six fifty cents plus one one one yuan; one six six dollars plus three eight eights plus one one one yuan; four sixsixes and two eighties
A student bought 6 stamps, including x $1 stamps and Y $2 stamps, sharing 10 yuan. How many stamps are 1 yuan and 2 yuan?
Assuming that all stamps are 1 yuan, the total cost is 1 × 6 = 6 yuan
Less use of 10-6 = 4 (yuan)
2 yuan is more than 1 yuan, 2-1 = 1 (yuan)
$2 stamps 4 ÷ 1 = 4 (stamps)
$1 stamps 6-4 = 2
A student from the United States and the United States bought 12 1 yuan stamps and 2 yuan stamps. They spent 20 yuan. How many 1 yuan stamps and 2 yuan stamps did the student buy?
Let's say that students from the United States and the United States buy x stamps of 1 yuan and (12-x) stamps of 2 yuan,
X + 2 (12-x) = 20
The result is: x = 4;
12-x = 12-4 = 8 (pieces)
A: the student bought 4 and 8 1 yuan stamps and 2 yuan stamps respectively
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