Question

A rectangle is 7 times longer than it is wide. It its perimeter is 144cm, what is it area?

Answer 1

9

Explanation:

→ Write an expression for the rectangles width

x

→ Write an expression for the rectangles length

7x

→ Now write an equation for the perimeter

x + 7x + x + 7x = 144

→ Simplify

16x = 144

→ Solve

x = 9