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2.70x+3.75=21.45
We move all terms to the left:
2.70x+3.75-(21.45)=0
We add all the numbers together, and all the variables
2.70x-17.7=0
We move all terms containing x to the left, all other terms to the right
2.70x=17.7
x=17.7/2.70
x=6+1/1.8
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