31+4z-z=40

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Solution for 31+4z-z=40 equation:


Simplifying
31 + 4z + -1z = 40

Combine like terms: 4z + -1z = 3z
31 + 3z = 40

Solving
31 + 3z = 40

Solving for variable 'z'.

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

Add '-31' to each side of the equation.
31 + -31 + 3z = 40 + -31

Combine like terms: 31 + -31 = 0
0 + 3z = 40 + -31
3z = 40 + -31

Combine like terms: 40 + -31 = 9
3z = 9

Divide each side by '3'.
z = 3

Simplifying
z = 3

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