15+7z+5=120

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Solution for 15+7z+5=120 equation:


Simplifying
15 + 7z + 5 = 120

Reorder the terms:
15 + 5 + 7z = 120

Combine like terms: 15 + 5 = 20
20 + 7z = 120

Solving
20 + 7z = 120

Solving for variable 'z'.

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

Add '-20' to each side of the equation.
20 + -20 + 7z = 120 + -20

Combine like terms: 20 + -20 = 0
0 + 7z = 120 + -20
7z = 120 + -20

Combine like terms: 120 + -20 = 100
7z = 100

Divide each side by '7'.
z = 14.28571429

Simplifying
z = 14.28571429

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