31=7-2z

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Solution for 31=7-2z equation:


Simplifying
31 = 7 + -2z

Solving
31 = 7 + -2z

Solving for variable 'z'.

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

Add '2z' to each side of the equation.
31 + 2z = 7 + -2z + 2z

Combine like terms: -2z + 2z = 0
31 + 2z = 7 + 0
31 + 2z = 7

Add '-31' to each side of the equation.
31 + -31 + 2z = 7 + -31

Combine like terms: 31 + -31 = 0
0 + 2z = 7 + -31
2z = 7 + -31

Combine like terms: 7 + -31 = -24
2z = -24

Divide each side by '2'.
z = -12

Simplifying
z = -12

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