7x+20=2x-30

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Solution for 7x+20=2x-30 equation: 



7x+20=2x-30

We move all terms to the left:

7x+20-(2x-30)=0

We get rid of parentheses

7x-2x+30+20=0

We add all the numbers together, and all the variables

5x+50=0

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

5x=-50

x=-50/5

x=-10

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