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-28.5=4.5x-7x
We move all terms to the left:
-28.5-(4.5x-7x)=0
We add all the numbers together, and all the variables
-(-2.5x)-28.5=0
We get rid of parentheses
2.5x-28.5=0
We move all terms containing x to the left, all other terms to the right
2.5x=28.5
x=28.5/2.5
x=11+1/2.5
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