Вычислите
1) 7x-5=x+7
2)10(8x-5)=110
3) 2-2(x-1)=4(x-2)

1)7x-5=x+7;

7x-x=7+5;

6x=12;

x=12:6;

x=2.

2)10(8x-5)=110;

80x-50=110;

80x=110+50;

80x=160;

x=160:80;

x=2

3) 2-2(x-1)=4(x-2);

2-2x-2=4x-8;

-2x-4x=-8-2-2;

-6x=-12;

x=-12:(-6);

x=2