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122=23+9x
We move all terms to the left:
122-(23+9x)=0
We add all the numbers together, and all the variables
-(9x+23)+122=0
We get rid of parentheses
-9x-23+122=0
We add all the numbers together, and all the variables
-9x+99=0
We move all terms containing x to the left, all other terms to the right
-9x=-99
x=-99/-9
x=+11
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