0.1x+0.3x=40

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Solution for 0.1x+0.3x=40 equation: 



0.1x+0.3x=40

We move all terms to the left:

0.1x+0.3x-(40)=0

We add all the numbers together, and all the variables

0.4x-40=0

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

0.4x=40

x=40/0.4

x=100

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