Question 971560
Put the x s on one side and the constants on the other.

-219+10x=57-2x

Add 2x to both sides
-219+12x=57

Add 219 to both sides
12 x = 276
divide by 12 NOT by 12x

x=276/12 =23

Check
-219 +(23*10)= 11

52-2(23) =11

Checks.