Answer:
Perimeter of the triangle is 58
Step-by-step explanation:
create an equation
(x+3)2+(2x-1)2=(x-7)+(4x-8)+(3x+1)
2x+6+4x-2=x-7+4x-8+3x+1
combine like terms
6x+4=8x-14
18=2x
x=9
now we substitute in the expression to find the perimeter
9-7=2
36-8=28
27+1=28
2+28+28=30+28=58
