x+2x+5x=420

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Solution for x+2x+5x=420 equation: 



x+2x+5x=420

We move all terms to the left:

x+2x+5x-(420)=0

We add all the numbers together, and all the variables

8x-420=0

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

8x=420

x=420/8

x=52+1/2

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