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-3.1(2x+5)=15.5
We move all terms to the left:
-3.1(2x+5)-(15.5)=0
We add all the numbers together, and all the variables
-3.1(2x+5)-15.5=0
We multiply parentheses
-6.2x-15.5-15.5=0
We add all the numbers together, and all the variables
-6.2x-31=0
We move all terms containing x to the left, all other terms to the right
-6.2x=31
x=31/-6.2
x=-5
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