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2x+(23-x)=19
We move all terms to the left:
2x+(23-x)-(19)=0
We add all the numbers together, and all the variables
2x+(-1x+23)-19=0
We get rid of parentheses
2x-1x+23-19=0
We add all the numbers together, and all the variables
x+4=0
We move all terms containing x to the left, all other terms to the right
x=-4
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