When integers have the same sign and you add them together the sum will have the same sign
7 + 5 = 13
-7 + (-5) = -13
Answer:
85+(5x-10)=11x+3 (sum of two non-adjacent interior angle is equal to exterior angle )
75+5x=11x+3
75-3=11x-5x
6x=72
x=72/6
x=12