x+20+2x=7x

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Solution for x+20+2x=7x equation: 



x+20+2x=7x

We move all terms to the left:

x+20+2x-(7x)=0

We add all the numbers together, and all the variables

-4x+20=0

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

-4x=-20

x=-20/-4

x=+5

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