3x+420=8x

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Solution for 3x+420=8x equation: 



3x+420=8x

We move all terms to the left:

3x+420-(8x)=0

We add all the numbers together, and all the variables

-5x+420=0

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

-5x=-420

x=-420/-5

x=+84

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