12-11z=-(-9z-4)

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Solution for 12-11z=-(-9z-4) equation:


Simplifying
12 + -11z = -1(-9z + -4)

Reorder the terms:
12 + -11z = -1(-4 + -9z)
12 + -11z = (-4 * -1 + -9z * -1)
12 + -11z = (4 + 9z)

Solving
12 + -11z = 4 + 9z

Solving for variable 'z'.

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

Add '-9z' to each side of the equation.
12 + -11z + -9z = 4 + 9z + -9z

Combine like terms: -11z + -9z = -20z
12 + -20z = 4 + 9z + -9z

Combine like terms: 9z + -9z = 0
12 + -20z = 4 + 0
12 + -20z = 4

Add '-12' to each side of the equation.
12 + -12 + -20z = 4 + -12

Combine like terms: 12 + -12 = 0
0 + -20z = 4 + -12
-20z = 4 + -12

Combine like terms: 4 + -12 = -8
-20z = -8

Divide each side by '-20'.
z = 0.4

Simplifying
z = 0.4

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