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14-3.5x+7-2x=-6.5
We move all terms to the left:
14-3.5x+7-2x-(-6.5)=0
We add all the numbers together, and all the variables
-5.5x+27.5=0
We move all terms containing x to the left, all other terms to the right
-5.5x=-27.5
x=-27.5/-5.5
x=+5
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