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0.15-0.8x=0.7
We move all terms to the left:
0.15-0.8x-(0.7)=0
We add all the numbers together, and all the variables
-0.8x-0.55=0
We move all terms containing x to the left, all other terms to the right
-0.8x=0.55
x=0.55/-0.8
x=-0.55/0.8
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