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23-x=142.
We move all terms to the left:
23-x-(142.)=0
We add all the numbers together, and all the variables
-x+23-142=0
We add all the numbers together, and all the variables
-1x-119=0
We move all terms containing x to the left, all other terms to the right
-x=119
x=119/-1
x=-119
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