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2.5x+(-5.5)=10.5
We move all terms to the left:
2.5x+(-5.5)-(10.5)=0
We add all the numbers together, and all the variables
2.5x-16=0
We move all terms containing x to the left, all other terms to the right
2.5x=16
x=16/2.5
x=6+1/2.5
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