Question

5x-15+14-7x-8x+28-3x+2=11-8-56+4x-(6-5)+8-2x

Answer 1

5x-15+14-7x-8x+28-3x+2-11+8+56-4x+6-5-8+2x=0;

1)5x-7x-8x-3x-4x+2x= -15x
2)14-15+28+2-11+8+56+6-5-8= 75

-15x+75=0;
-15x=-75;
x=5

Ответ: 5.