x/0.4=30

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Solution for x/0.4=30 equation: 



x/0.4=30

We move all terms to the left:

x/0.4-(30)=0

We multiply all the terms by the denominator


x-30*0.4=0

We add all the numbers together, and all the variables

x-12=0

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

x=12

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