7x-7=20-2x

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



7x-7=20-2x
We move all terms to the left:
7x-7-(20-2x)=0
We add all the numbers together, and all the variables
7x-(-2x+20)-7=0
We get rid of parentheses
7x+2x-20-7=0
We add all the numbers together, and all the variables
9x-27=0
We move all terms containing x to the left, all other terms to the right
9x=27
x=27/9
x=3

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