30z=300-20z

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Solution for 30z=300-20z equation: 


Simplifying
30z = 300 + -20z

Solving
30z = 300 + -20z

Solving for variable 'z'.

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

Add '20z' to each side of the equation.
30z + 20z = 300 + -20z + 20z

Combine like terms: 30z + 20z = 50z
50z = 300 + -20z + 20z

Combine like terms: -20z + 20z = 0
50z = 300 + 0
50z = 300

Divide each side by '50'.
z = 6

Simplifying
z = 6

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