4z+z=30

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Solution for 4z+z=30 equation: 


Simplifying
4z + z = 30

Combine like terms: 4z + z = 5z
5z = 30

Solving
5z = 30

Solving for variable 'z'.

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

Divide each side by '5'.
z = 6

Simplifying
z = 6

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