4z+20=90

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Solution for 4z+20=90 equation: 


Simplifying
4z + 20 = 90

Reorder the terms:
20 + 4z = 90

Solving
20 + 4z = 90

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 + 4z = 90 + -20

Combine like terms: 20 + -20 = 0
0 + 4z = 90 + -20
4z = 90 + -20

Combine like terms: 90 + -20 = 70
4z = 70

Divide each side by '4'.
z = 17.5

Simplifying
z = 17.5

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