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0.2x-0.7x=12-3
We move all terms to the left:
0.2x-0.7x-(12-3)=0
We add all the numbers together, and all the variables
0.2x-0.7x-9=0
We add all the numbers together, and all the variables
-0.5x-9=0
We move all terms containing x to the left, all other terms to the right
-0.5x=9
x=9/-0.5
x=-18
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