50-4z=30

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Solution for 50-4z=30 equation: 


Simplifying
50 + -4z = 30

Solving
50 + -4z = 30

Solving for variable 'z'.

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

Add '-50' to each side of the equation.
50 + -50 + -4z = 30 + -50

Combine like terms: 50 + -50 = 0
0 + -4z = 30 + -50
-4z = 30 + -50

Combine like terms: 30 + -50 = -20
-4z = -20

Divide each side by '-4'.
z = 5

Simplifying
z = 5

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