Respuesta :

-3(5x+2)+7=-(10x+6)+17
-15x - 6 + 7 = -10x - 6 + 17
-15x + 1 = -10x + 11
-15x + 10x = +11 -1
-5x = 10
x = 10/-5
x = -2

answer is 
C:-2