Posted by Chris on .
The perimeter of a triangle is 47 miles. The first side is 5 miles less than twice the second and the third is 2 miles more than the first. Find the lengths of each side.

algebra 
Steve,
if x is second side,
first is 2x5
third is 2x5+2 = 2x3
so,
2x5 + x + 2x3 = 47
5x = 55
x = 11
So, the 3 sides are 17,11,19