3z+1+z+7=90

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Solution for 3z+1+z+7=90 equation:


Simplifying
3z + 1 + z + 7 = 90

Reorder the terms:
1 + 7 + 3z + z = 90

Combine like terms: 1 + 7 = 8
8 + 3z + z = 90

Combine like terms: 3z + z = 4z
8 + 4z = 90

Solving
8 + 4z = 90

Solving for variable 'z'.

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

Add '-8' to each side of the equation.
8 + -8 + 4z = 90 + -8

Combine like terms: 8 + -8 = 0
0 + 4z = 90 + -8
4z = 90 + -8

Combine like terms: 90 + -8 = 82
4z = 82

Divide each side by '4'.
z = 20.5

Simplifying
z = 20.5

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