Question

If a rectangle has a perimeter of 70, a length of x and a width of x - 9, find the value of the length of the rectangle.

Answer 1

Perimeter is sum of length and width:
$$
\text{length}+\text{width}=x+(x-9)=70
$$
Solve for x, then length = x.

Answer 2

Thanks!

Answer 3

Perimeter is sum of twice width + twice length

Answer 4

2x+2x-18=70

Answer 5

That is true! Thank @Mertsj

Answer 6

yw

Answer 7

I got it now. Thanks!