(7z-1)+(13z+1)+90=180

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Solution for (7z-1)+(13z+1)+90=180 equation:


Simplifying
(7z + -1) + (13z + 1) + 90 = 180

Reorder the terms:
(-1 + 7z) + (13z + 1) + 90 = 180

Remove parenthesis around (-1 + 7z)
-1 + 7z + (13z + 1) + 90 = 180

Reorder the terms:
-1 + 7z + (1 + 13z) + 90 = 180

Remove parenthesis around (1 + 13z)
-1 + 7z + 1 + 13z + 90 = 180

Reorder the terms:
-1 + 1 + 90 + 7z + 13z = 180

Combine like terms: -1 + 1 = 0
0 + 90 + 7z + 13z = 180
90 + 7z + 13z = 180

Combine like terms: 7z + 13z = 20z
90 + 20z = 180

Solving
90 + 20z = 180

Solving for variable 'z'.

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

Add '-90' to each side of the equation.
90 + -90 + 20z = 180 + -90

Combine like terms: 90 + -90 = 0
0 + 20z = 180 + -90
20z = 180 + -90

Combine like terms: 180 + -90 = 90
20z = 90

Divide each side by '20'.
z = 4.5

Simplifying
z = 4.5

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