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