4x+x=420

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Solution for 4x+x=420 equation: 



4x+x=420

We move all terms to the left:

4x+x-(420)=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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