Finding the solution of 8 = 7-2y

Finding the solution of 8 = 7-2y

-2y=-1

If we know that x plus three and Y minus one equals zero, then x of two plus y of eight

This is the X + 3y-3-y-1 = x + 3Y + 3y-1 = x + 3Y = 12, and it will be 710; X + 8, and it; y = 2, and it will be 710; X + 2, and it will be 710; (3; (3Y) ≥ ≥ 2 [2 \35;#35\\\\\\\710; 710; X; X + 2 \\\\\\\\\\\\\\\\\\\\\\\ifx = 3Y, x + 3Y = 1, we can get x = 1 / 2, y = 1 / 6

Is 2 / x + 3 equal to 0 an equation? Why

Equation: an equation containing unknowns
This formula contains the unknown number x, and it is an equation, so it is an equation

For a two digit number, the ten digit number is 3 greater than the one digit number, and the product of the two digits is equal to 27 of the two digit number. If the one digit number is x, the equation can be listed______ ．

Then, let x + 3 be ten digits, then x + 3 = X

For a two digit number, the ten digit number is 3 larger than the single digit number, and the product of the two digits is equal to 7 / 2 of the two digits. If the single digit number is x, the equation can be listed
It's two out of seven

X (x + 3) = 7 / 2 * 10 (x + 3) + 7 / 2x, no solution, let's see if the problem is right

78.5 plus three times x is 150.8. The number 40% less than a number is 37.5. Find this number

78.5+3x=150.8
3x=72.3
x=24.1
x-40%x=37.5
0.6x=37.5
x=62.5

Three times a number is equal to the difference between 20% and 6

Let a number be x, then
3x=20%x-6
300=20x-600
300+600=20x
900=20x
x=45

The 56 books are divided into two groups. The 1 / 3 of group A is equal to the 1 / 4 of group B. how many books do group A and group B get?

Let's divide them into group A and group B (56-x)
X/3=(56-X)/4,
So 4x = 3 (56-x),
So 4x = 168-3x,
So 7x = 168,
So x = 24,
So 56-x = 32,
They were divided into group A (24 copies) and group B (32 copies)

There are 49 books in class three (1). The first group has 4 more books than the second group. The second group has 6 more books than the third group. How many books do the third group have?
There are 49 books in class three (1). The first group has 4 more books than the second group. The second group has 6 more books than the third group. How many books do the third group have?

Suppose the third group has x books, then the second group has (x + 6) books and the first group has (x + 6 + 4) books
Equation: x + (x + 6) + (x + 10) = 49
The solution is: x = 11 (Ben)
Comprehensive formula of primary school arithmetic: [49-4 - (4 + 6)] 3 = 11 (original)

1. 20% of a number is 15 less than its 4 / 1. Find the number. 2. The sum of 8 times of a number plus 3 / 2 of 30 is 52. What is the number

1. 20% of a number is 15 less than 4 / 1. Find the number
15/(1/4-20%)=15/(1/4-1/5)=300
A: the number is 300
2. The sum of 8 times of a number plus 3 / 2 of 30 is 52. What's the number
(52-30*2/3)/8=4
A: the number is 4
[Note: 1 / 4 means one quarter, 2 / 3 means two thirds]