-3g+6+2g=21

Solution for -3g+6+2g=21 equation:

Simplifying
-3g + 6 + 2g = 21

Reorder the terms:
6 + -3g + 2g = 21

Combine like terms: -3g + 2g = -1g
6 + -1g = 21

Solving
6 + -1g = 21

Solving for variable 'g'.

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

Add '-6' to each side of the equation.
6 + -6 + -1g = 21 + -6

Combine like terms: 6 + -6 = 0
0 + -1g = 21 + -6
-1g = 21 + -6

Combine like terms: 21 + -6 = 15
-1g = 15

Divide each side by '-1'.
g = -15

Simplifying
g = -15