-8=2(m+3)

Solution for -8=2(m+3) equation:

Simplifying
-8 = 2(m + 3)

Reorder the terms:
-8 = 2(3 + m)
-8 = (3 * 2 + m * 2)
-8 = (6 + 2m)

Solving
-8 = 6 + 2m

Solving for variable 'm'.

Move all terms containing m to the left, all other terms to the right.

Add '-2m' to each side of the equation.
-8 + -2m = 6 + 2m + -2m

Combine like terms: 2m + -2m = 0
-8 + -2m = 6 + 0
-8 + -2m = 6

Add '8' to each side of the equation.
-8 + 8 + -2m = 6 + 8

Combine like terms: -8 + 8 = 0
0 + -2m = 6 + 8
-2m = 6 + 8

Combine like terms: 6 + 8 = 14
-2m = 14

Divide each side by '-2'.
m = -7

Simplifying
m = -7