Question

This is a two step equation.

(I missed a week of school, the week we learned all of this)
-2a - 9 = 39

Answer 1

a=-24

Add nine on both sides

-2a-9=39
+9 +9
——————-
-2a = 48

Divide -2 on both sides.

-2a-9=39
+9 +9
——————-
-2a = 48
—— ——
-2 -2

a = -24

Answer 2

a= -24

Explanation:

-2a-9=39

-2a-9+9=39+9

-2a= 48

-2a/-2=48/-2