SOLUTION: The perimeter of a triangle is 45 inches. The fist side is twice the length of the second, and the third side is 5 inches longer than the second. Find the length of each side.

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Question 278369: The perimeter of a triangle is 45 inches. The fist side is twice the length of the second, and the third side is 5 inches longer than the second. Find the length of each side.
Answer by JBarnum(2146) About Me  (Show Source):
You can put this solution on YOUR website!
a+b+c=45
a=2b
c=5+b
substitute and solve for b, then a and c.
2b%2Bb%2B5%2Bb=45 add
4b%2B5=45 subtract
4b=40 divide
highlight%28b=10%29 second
a=2b
a=2%2810%29
highlight%28a=20%29 first
c=5+b
c=5%2B%2810%29
highlight%28c=15%29 third