7z+3z+6=90

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Solution for 7z+3z+6=90 equation:


Simplifying
7z + 3z + 6 = 90

Reorder the terms:
6 + 7z + 3z = 90

Combine like terms: 7z + 3z = 10z
6 + 10z = 90

Solving
6 + 10z = 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 + 10z = 90 + -6

Combine like terms: 6 + -6 = 0
0 + 10z = 90 + -6
10z = 90 + -6

Combine like terms: 90 + -6 = 84
10z = 84

Divide each side by '10'.
z = 8.4

Simplifying
z = 8.4

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