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20-x/4=9
We move all terms to the left:
20-x/4-(9)=0
We add all the numbers together, and all the variables
-x/4+11=0
We multiply all the terms by the denominator
-x+11*4=0
We add all the numbers together, and all the variables
-1x+44=0
We move all terms containing x to the left, all other terms to the right
-x=-44
x=-44/-1
x=+44
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