algebra
posted by LaTasha .
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.

algebra 
Reiny
Just translate into math:
shortest side  x
longest side  x+7
remaining side  x+2
solve:
x + x+7 + x+2 = 45
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