SOLUTION: the measure of two sides of an eqilateral triangle are 3x+15 and 7x-5.what is the measure of the third side?

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Question 373965: the measure of two sides of an eqilateral triangle are 3x+15 and 7x-5.what is the measure of the third side?
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
Since it's equilateral,
3x%2B15=7x-5
-4x=-20
x=5
.
.
.
3x%2B15=7x-5=3%285%29%2B15=15%2B15=30
s=30
All sides have a length of 30.