-12=-2(q-9)

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Solution for -12=-2(q-9) equation:


Simplifying
-12 = -2(q + -9)

Reorder the terms:
-12 = -2(-9 + q)
-12 = (-9 * -2 + q * -2)
-12 = (18 + -2q)

Solving
-12 = 18 + -2q

Solving for variable 'q'.

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

Add '2q' to each side of the equation.
-12 + 2q = 18 + -2q + 2q

Combine like terms: -2q + 2q = 0
-12 + 2q = 18 + 0
-12 + 2q = 18

Add '12' to each side of the equation.
-12 + 12 + 2q = 18 + 12

Combine like terms: -12 + 12 = 0
0 + 2q = 18 + 12
2q = 18 + 12

Combine like terms: 18 + 12 = 30
2q = 30

Divide each side by '2'.
q = 15

Simplifying
q = 15

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