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x-0.8x=-3.4
We move all terms to the left:
x-0.8x-(-3.4)=0
We add all the numbers together, and all the variables
0.2x+3.4=0
We move all terms containing x to the left, all other terms to the right
0.2x=-3.4
x=-3.4/0.2
x=-17+-4.4408920985006E-16/0.2
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