7x-20=3x+30

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Solution for 7x-20=3x+30 equation: 



7x-20=3x+30

We move all terms to the left:

7x-20-(3x+30)=0

We get rid of parentheses

7x-3x-30-20=0

We add all the numbers together, and all the variables

4x-50=0

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

4x=50

x=50/4

x=12+1/2

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