7x+11=8x+20

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Solution for 7x+11=8x+20 equation: 



7x+11=8x+20

We move all terms to the left:

7x+11-(8x+20)=0

We get rid of parentheses

7x-8x-20+11=0

We add all the numbers together, and all the variables

-1x-9=0

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

-x=9

x=9/-1

x=-9

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