The perimeter of a triangle is 45 centimeters. Find the lengths of its sides, if the longest side is 7 centimeters longer than the shortest side, and the remaining side is 2 centimeters longer than the shortest side.

Answer 1

Just translate into math:

shortest side --- x
longest side ---- x+7
remaining side --- x+2

solve:
x + x+7 + x+2 = 45