12-(-9z)=8-4z

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Solution for 12-(-9z)=8-4z equation:


Simplifying
12 + -1(-9z) = 8 + -4z

Remove parenthesis around (-9z)
12 + -1 * -9z = 8 + -4z

Multiply -1 * -9
12 + 9z = 8 + -4z

Solving
12 + 9z = 8 + -4z

Solving for variable 'z'.

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

Add '4z' to each side of the equation.
12 + 9z + 4z = 8 + -4z + 4z

Combine like terms: 9z + 4z = 13z
12 + 13z = 8 + -4z + 4z

Combine like terms: -4z + 4z = 0
12 + 13z = 8 + 0
12 + 13z = 8

Add '-12' to each side of the equation.
12 + -12 + 13z = 8 + -12

Combine like terms: 12 + -12 = 0
0 + 13z = 8 + -12
13z = 8 + -12

Combine like terms: 8 + -12 = -4
13z = -4

Divide each side by '13'.
z = -0.3076923077

Simplifying
z = -0.3076923077

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