Question

The width of ben's rectangular family room is 3ft less than the length. The perimeter is 70 ft. Which equation can be used to find the length L of the room? A.) 70=L-3 B.) 70=2L-3 C.) 70=2(l-3) or D.) 70=2(2L-3) ?

Answer 1

This can be solved by establishing a system of equation, since

W = L – 3

And the perimeter is

2w + 2L = 70

Substituting the w in the second equation

2(L-3) + 2L = 70

4L = 70 + 6

4L = 76

L = 19 ft

W = 16 ft