30=3z-4z

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Solution for 30=3z-4z equation: 



30=3z-4z

We move all terms to the left:

30-(3z-4z)=0

We add all the numbers together, and all the variables

-(-1z)+30=0

We get rid of parentheses

1z+30=0

We add all the numbers together, and all the variables

z+30=0

We move all terms containing z to the left, all other terms to the right

z=-30

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