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x/0.28=-4.5
We move all terms to the left:
x/0.28-(-4.5)=0
We add all the numbers together, and all the variables
x/0.28+4.5=0
We multiply all the terms by the denominator
x+(4.5)*0.28=0
We add all the numbers together, and all the variables
x+1.26=0
We move all terms containing x to the left, all other terms to the right
x=-1.26
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