.4*x=300

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Solution for .4*x=300 equation: 



.4*x=300

We move all terms to the left:

.4*x-(300)=0

We add all the numbers together, and all the variables

.4x-300=0

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

.4x=300

x=300/.4

x=750

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