12=-4(-9-3z)

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Solution for 12=-4(-9-3z) equation: 


Simplifying
12 = -4(-9 + -3z)
12 = (-9 * -4 + -3z * -4)
12 = (36 + 12z)

Solving
12 = 36 + 12z

Solving for variable 'z'.

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

Add '-12z' to each side of the equation.
12 + -12z = 36 + 12z + -12z

Combine like terms: 12z + -12z = 0
12 + -12z = 36 + 0
12 + -12z = 36

Add '-12' to each side of the equation.
12 + -12 + -12z = 36 + -12

Combine like terms: 12 + -12 = 0
0 + -12z = 36 + -12
-12z = 36 + -12

Combine like terms: 36 + -12 = 24
-12z = 24

Divide each side by '-12'.
z = -2

Simplifying
z = -2

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