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3.1-x/8=-15.9
We move all terms to the left:
3.1-x/8-(-15.9)=0
We add all the numbers together, and all the variables
-x/8+19=0
We multiply all the terms by the denominator
-x+19*8=0
We add all the numbers together, and all the variables
-1x+152=0
We move all terms containing x to the left, all other terms to the right
-x=-152
x=-152/-1
x=+152
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