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0.4x+3.9=5.68
We move all terms to the left:
0.4x+3.9-(5.68)=0
We add all the numbers together, and all the variables
0.4x-1.78=0
We move all terms containing x to the left, all other terms to the right
0.4x=1.78
x=1.78/0.4
x=4+0.18/0.4
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