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12.5x+4x=-9.5-4x
We move all terms to the left:
12.5x+4x-(-9.5-4x)=0
We add all the numbers together, and all the variables
12.5x+4x-(-4x-9.5)=0
We add all the numbers together, and all the variables
16.5x-(-4x-9.5)=0
We get rid of parentheses
16.5x+4x+9.5=0
We add all the numbers together, and all the variables
20.5x+9.5=0
We move all terms containing x to the left, all other terms to the right
20.5x=-9.5
x=-9.5/20.5
x=-6.3333333333333/13.666666666667
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