How do you check your answer when solving a two step equation?

this is the equation i'm working on.

-2q-5 = -11

+5 +5

-2q = -6

÷(-2) ÷(-2)

q = 3

check: -2 (3)-3 = 11

as you can see, i started to check my answer, but they're confused on what to do next.

dilation scale factor 2: starting with δabc, draw the dilation image of the triangle with a center at the origin and a scale factor of two. notice that every coordinate of the original triangle has been multiplied by the scale factor (x2). dilation with scale factor 2, multiply by 2.