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.



4
31
13
22

Answer 1

22

Answer 2

perimeter =2(length+width)

Answer 3

it's 2x+2y=70
so x+y=35
and y=x-9
so it makes 2x-9=35
2x=44
x=22