x=420+0.40x

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Solution for x=420+0.40x equation: 



x=420+0.40x

We move all terms to the left:

x-(420+0.40x)=0

We add all the numbers together, and all the variables

x-(0.40x+420)=0

We get rid of parentheses

x-0.40x-420=0

We add all the numbers together, and all the variables

0.6x-420=0

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

0.6x=420

x=420/0.6

x=700

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