Question

Which equation would best help solve the following problem?
The altitude of a triangle is 5 m less than its base. The area of the triangle is 42 m^2. Find the length of the base.

Answer 1

the triangle area formula
(1/2)*base*height = area
you have area, height, and you need base

Answer 2

so would my answer be 42 = 1/2(x)(x-5)

Answer 3

yes