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-143=-11x+99
We move all terms to the left:
-143-(-11x+99)=0
We get rid of parentheses
11x-99-143=0
We add all the numbers together, and all the variables
11x-242=0
We move all terms containing x to the left, all other terms to the right
11x=242
x=242/11
x=22
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