7z-1+13z+1=90

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Solution for 7z-1+13z+1=90 equation: 


Simplifying
7z + -1 + 13z + 1 = 90

Reorder the terms:
-1 + 1 + 7z + 13z = 90

Combine like terms: -1 + 1 = 0
0 + 7z + 13z = 90
7z + 13z = 90

Combine like terms: 7z + 13z = 20z
20z = 90

Solving
20z = 90

Solving for variable 'z'.

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

Divide each side by '20'.
z = 4.5

Simplifying
z = 4.5

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