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The sum of a number and 3 is 10 less than twice the number?
x+3=2x-10
Equation calculation formula (2.6 + x = 10, 5.8 + x = 12.5)
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2.6+x=10
2.6+x-2.6=10-2.6
x=7.4
5.8+x=12.5
5.8+x-5.8=12.5-5.8
x=6.7
Subtract X and 2 from 30, the difference is 14, find x, there is a number divided by 417, the quotient is 28, the remainder is 27, what is this number
If 8 of X is added to 5 times of X, it will be 169
1 30-2X=14
2X=16
X=16/2
X=8
Let this number be X
X=417*28+27
X=11676+27
X=11703
3 8X+5X=169
13X=169
X=169/13
X=13
Use a 54 cm long wire to form a rectangle. If the length is twice the width, what is the length and width of the rectangle? What's the area?
So the length of the rectangle is 9 × 2 = 18 (CM), and the area is 18 × 9 = 162 (CM). A: the length of the rectangle is 18 cm, the width is 9 cm, and the area is 162 square cm
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