9+9z-2=9z+31-4z

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Solution for 9+9z-2=9z+31-4z equation:


Simplifying
9 + 9z + -2 = 9z + 31 + -4z

Reorder the terms:
9 + -2 + 9z = 9z + 31 + -4z

Combine like terms: 9 + -2 = 7
7 + 9z = 9z + 31 + -4z

Reorder the terms:
7 + 9z = 31 + 9z + -4z

Combine like terms: 9z + -4z = 5z
7 + 9z = 31 + 5z

Solving
7 + 9z = 31 + 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.
7 + 9z + -5z = 31 + 5z + -5z

Combine like terms: 9z + -5z = 4z
7 + 4z = 31 + 5z + -5z

Combine like terms: 5z + -5z = 0
7 + 4z = 31 + 0
7 + 4z = 31

Add '-7' to each side of the equation.
7 + -7 + 4z = 31 + -7

Combine like terms: 7 + -7 = 0
0 + 4z = 31 + -7
4z = 31 + -7

Combine like terms: 31 + -7 = 24
4z = 24

Divide each side by '4'.
z = 6

Simplifying
z = 6

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