7z-13=15

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Solution for 7z-13=15 equation: 


Simplifying
7z + -13 = 15

Reorder the terms:
-13 + 7z = 15

Solving
-13 + 7z = 15

Solving for variable 'z'.

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

Add '13' to each side of the equation.
-13 + 13 + 7z = 15 + 13

Combine like terms: -13 + 13 = 0
0 + 7z = 15 + 13
7z = 15 + 13

Combine like terms: 15 + 13 = 28
7z = 28

Divide each side by '7'.
z = 4

Simplifying
z = 4

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