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0.4x+1.2=8.6
We move all terms to the left:
0.4x+1.2-(8.6)=0
We add all the numbers together, and all the variables
0.4x-7.4=0
We move all terms containing x to the left, all other terms to the right
0.4x=7.4
x=7.4/0.4
x=18+0.2/0.4
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