40x+30x=70x+20x

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Solution for 40x+30x=70x+20x equation: 



40x+30x=70x+20x

We move all terms to the left:

40x+30x-(70x+20x)=0

We add all the numbers together, and all the variables

40x+30x-(+90x)=0

We add all the numbers together, and all the variables

70x-(+90x)=0

We get rid of parentheses

70x-90x=0

We add all the numbers together, and all the variables

-20x=0

x=0/-20

x=0

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