SOLUTION: each side of a triangle is increased by 10 cm. of the ratio of the perimeter of the new triangle and the given triangle is 5:4. find the perimeter of given triangle.

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Question 102731: each side of a triangle is increased by 10 cm. of the ratio of the perimeter of the new triangle and the given triangle is 5:4. find the perimeter of given triangle.
Answer by edjones(7311) About Me  (Show Source):
You can put this solution on YOUR website!
Let p=original perimeter P+30=new perimeter
%28p%2B30%29%2Fp=5%2F4
4(p+30)=5p multiply both sides times 4p to eliminate fractions.
4p+120=5p
p=120 subtract 4p from both sides.
p+30=150
Check:
150%2F120=5%2F4
Ed