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10x+23=2x-21
We move all terms to the left:
10x+23-(2x-21)=0
We get rid of parentheses
10x-2x+21+23=0
We add all the numbers together, and all the variables
8x+44=0
We move all terms containing x to the left, all other terms to the right
8x=-44
x=-44/8
x=-5+1/2
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