7th grade math
posted by CJ .
Write and simplify an expression for the perimeter of the triangle. side A)3x, side B) 5x4 and side C)2x+5.
Thank you!

First, start out by simply adding the sides together into a single equation:
3x+5x4+2x+5
Next, combine like items:
3x+5x+2x = +10x
4+5 = +1
That would leave you with:
10x+1
That is as simplified as it gets, so that means you have your answer now.