0.4x+1.5=3.9

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Solution for 0.4x+1.5=3.9 equation: 



0.4x+1.5=3.9

We move all terms to the left:

0.4x+1.5-(3.9)=0

We add all the numbers together, and all the variables

0.4x-2.4=0

We move all terms containing x to the left, all other terms to the right

0.4x=2.4

x=2.4/0.4

x=5+0.4/0.4

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