30-7z=-4

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Solution for 30-7z=-4 equation: 


Simplifying
30 + -7z = -4

Solving
30 + -7z = -4

Solving for variable 'z'.

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

Add '-30' to each side of the equation.
30 + -30 + -7z = -4 + -30

Combine like terms: 30 + -30 = 0
0 + -7z = -4 + -30
-7z = -4 + -30

Combine like terms: -4 + -30 = -34
-7z = -34

Divide each side by '-7'.
z = 4.857142857

Simplifying
z = 4.857142857

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