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7-9x+13=2x+20-11x
We move all terms to the left:
7-9x+13-(2x+20-11x)=0
We add all the numbers together, and all the variables
-9x-(-9x+20)+7+13=0
We add all the numbers together, and all the variables
-9x-(-9x+20)+20=0
We get rid of parentheses
-9x+9x-20+20=0
We add all the numbers together, and all the variables
=0
x=0/1
x=0
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