20=z+3z-20

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Solution for 20=z+3z-20 equation: 



20=z+3z-20

We move all terms to the left:

20-(z+3z-20)=0

We add all the numbers together, and all the variables

-(4z-20)+20=0

We get rid of parentheses

-4z+20+20=0

We add all the numbers together, and all the variables

-4z+40=0

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

-4z=-40

z=-40/-4

z=+10

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