z+2+7z-8=90

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Solution for z+2+7z-8=90 equation:


Simplifying
z + 2 + 7z + -8 = 90

Reorder the terms:
2 + -8 + z + 7z = 90

Combine like terms: 2 + -8 = -6
-6 + z + 7z = 90

Combine like terms: z + 7z = 8z
-6 + 8z = 90

Solving
-6 + 8z = 90

Solving for variable 'z'.

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

Add '6' to each side of the equation.
-6 + 6 + 8z = 90 + 6

Combine like terms: -6 + 6 = 0
0 + 8z = 90 + 6
8z = 90 + 6

Combine like terms: 90 + 6 = 96
8z = 96

Divide each side by '8'.
z = 12

Simplifying
z = 12

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