12z-(5z+8)=3(z-7)+9

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Solution for 12z-(5z+8)=3(z-7)+9 equation:


Simplifying
12z + -1(5z + 8) = 3(z + -7) + 9

Reorder the terms:
12z + -1(8 + 5z) = 3(z + -7) + 9
12z + (8 * -1 + 5z * -1) = 3(z + -7) + 9
12z + (-8 + -5z) = 3(z + -7) + 9

Reorder the terms:
-8 + 12z + -5z = 3(z + -7) + 9

Combine like terms: 12z + -5z = 7z
-8 + 7z = 3(z + -7) + 9

Reorder the terms:
-8 + 7z = 3(-7 + z) + 9
-8 + 7z = (-7 * 3 + z * 3) + 9
-8 + 7z = (-21 + 3z) + 9

Reorder the terms:
-8 + 7z = -21 + 9 + 3z

Combine like terms: -21 + 9 = -12
-8 + 7z = -12 + 3z

Solving
-8 + 7z = -12 + 3z

Solving for variable 'z'.

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

Add '-3z' to each side of the equation.
-8 + 7z + -3z = -12 + 3z + -3z

Combine like terms: 7z + -3z = 4z
-8 + 4z = -12 + 3z + -3z

Combine like terms: 3z + -3z = 0
-8 + 4z = -12 + 0
-8 + 4z = -12

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

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

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

Divide each side by '4'.
z = -1

Simplifying
z = -1

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