21=-6+q

Solution for 21=-6+q equation:

Simplifying
21 = -6 + q

Solving
21 = -6 + q

Solving for variable 'q'.

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

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

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

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

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

Combine like terms: -6 + -21 = -27
-1q = -27

Divide each side by '-1'.
q = 27

Simplifying
q = 27