7z-4=31

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Solution for 7z-4=31 equation: 


Simplifying
7z + -4 = 31

Reorder the terms:
-4 + 7z = 31

Solving
-4 + 7z = 31

Solving for variable 'z'.

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

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

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

Combine like terms: 31 + 4 = 35
7z = 35

Divide each side by '7'.
z = 5

Simplifying
z = 5

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