2z+12=5z-9

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Solution for 2z+12=5z-9 equation:


Simplifying
2z + 12 = 5z + -9

Reorder the terms:
12 + 2z = 5z + -9

Reorder the terms:
12 + 2z = -9 + 5z

Solving
12 + 2z = -9 + 5z

Solving for variable 'z'.

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

Add '-5z' to each side of the equation.
12 + 2z + -5z = -9 + 5z + -5z

Combine like terms: 2z + -5z = -3z
12 + -3z = -9 + 5z + -5z

Combine like terms: 5z + -5z = 0
12 + -3z = -9 + 0
12 + -3z = -9

Add '-12' to each side of the equation.
12 + -12 + -3z = -9 + -12

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

Combine like terms: -9 + -12 = -21
-3z = -21

Divide each side by '-3'.
z = 7

Simplifying
z = 7

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