(9z-12)-(-3z)=

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


Simplifying
(9z + -12) + -1(-3z) = 0

Reorder the terms:
(-12 + 9z) + -1(-3z) = 0

Remove parenthesis around (-12 + 9z)
-12 + 9z + -1(-3z) = 0

Remove parenthesis around (-3z)
-12 + 9z + -1 * -3z = 0

Multiply -1 * -3
-12 + 9z + 3z = 0

Combine like terms: 9z + 3z = 12z
-12 + 12z = 0

Solving
-12 + 12z = 0

Solving for variable 'z'.

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

Add '12' to each side of the equation.
-12 + 12 + 12z = 0 + 12

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

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

Divide each side by '12'.
z = 1

Simplifying
z = 1

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