35 + 52 + 3(x + 2) = 180
87 + 3x + 6 = 180 ( add the like terms and use distributive property)
93 + 3x = 180
-93 -93
3x = 87
÷3 ÷3
x = 29
( the sum of all triangle angles is 180)
X^3(1/y^2)-4 is (x^3y^-2)-4 simplified with only positive exponents
Try 86.36%, I hope this helps!