40+20x=30x

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Solution for 40+20x=30x equation: 



40+20x=30x

We move all terms to the left:

40+20x-(30x)=0

We add all the numbers together, and all the variables

-10x+40=0

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

-10x=-40

x=-40/-10

x=+4

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