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0.8x-0.4+0.6x=8
We move all terms to the left:
0.8x-0.4+0.6x-(8)=0
We add all the numbers together, and all the variables
1.4x-8.4=0
We move all terms containing x to the left, all other terms to the right
1.4x=8.4
x=8.4/1.4
x=6+1.7763568394003E-15/1.4
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