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(-11x+21)/3=x+9
We move all terms to the left:
(-11x+21)/3-(x+9)=0
We get rid of parentheses
(-11x+21)/3-x-9=0
We multiply all the terms by the denominator
(-11x+21)-x*3-9*3=0
We add all the numbers together, and all the variables
(-11x+21)-x*3-27=0
Wy multiply elements
(-11x+21)-3x-27=0
We get rid of parentheses
-11x-3x+21-27=0
We add all the numbers together, and all the variables
-14x-6=0
We move all terms containing x to the left, all other terms to the right
-14x=6
x=6/-14
x=-3/7
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