Respuesta :

Move 3 to the other side to isolate x.

-10 = 2x

Divide both sides by 2 to isolate x.

-5 = x
remember, you can do anything to an equation as long as you do it to both sides


-7=3+2x
minus 3 from both sides
-3-7=3-3+2x
-10=0+2x
-10=2x
dividie both sides by 2
-10/2=(2x)/2
-5=x
x=-5