9-4z=-31+4z

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


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

Solving
9 + -4z = -31 + 4z

Solving for variable 'z'.

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

Add '-4z' to each side of the equation.
9 + -4z + -4z = -31 + 4z + -4z

Combine like terms: -4z + -4z = -8z
9 + -8z = -31 + 4z + -4z

Combine like terms: 4z + -4z = 0
9 + -8z = -31 + 0
9 + -8z = -31

Add '-9' to each side of the equation.
9 + -9 + -8z = -31 + -9

Combine like terms: 9 + -9 = 0
0 + -8z = -31 + -9
-8z = -31 + -9

Combine like terms: -31 + -9 = -40
-8z = -40

Divide each side by '-8'.
z = 5

Simplifying
z = 5

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