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100=4.50x-280
We move all terms to the left:
100-(4.50x-280)=0
We get rid of parentheses
-4.50x+280+100=0
We add all the numbers together, and all the variables
-4.5x+380=0
We move all terms containing x to the left, all other terms to the right
-4.5x=-380
x=-380/-4.5
x=84+1/2.25
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