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4.2+x/3=-3.3
We move all terms to the left:
4.2+x/3-(-3.3)=0
We add all the numbers together, and all the variables
x/3+7.5=0
We multiply all the terms by the denominator
x+(7.5)*3=0
We add all the numbers together, and all the variables
x+22.5=0
We move all terms containing x to the left, all other terms to the right
x=-22.5
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