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x/4.2=-50
We move all terms to the left:
x/4.2-(-50)=0
We add all the numbers together, and all the variables
x/4.2+50=0
We multiply all the terms by the denominator
x+50*4.2=0
We add all the numbers together, and all the variables
x+210=0
We move all terms containing x to the left, all other terms to the right
x=-210
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