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8x+24=21-3x
We move all terms to the left:
8x+24-(21-3x)=0
We add all the numbers together, and all the variables
8x-(-3x+21)+24=0
We get rid of parentheses
8x+3x-21+24=0
We add all the numbers together, and all the variables
11x+3=0
We move all terms containing x to the left, all other terms to the right
11x=-3
x=-3/11
x=-3/11
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