90+x=6x

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Solution for 90+x=6x equation: 



90+x=6x

We move all terms to the left:

90+x-(6x)=0

We add all the numbers together, and all the variables

-5x+90=0

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

-5x=-90

x=-90/-5

x=+18

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