40=x+0.007x+20x

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Solution for 40=x+0.007x+20x equation: 



40=x+0.007x+20x

We move all terms to the left:

40-(x+0.007x+20x)=0

We add all the numbers together, and all the variables

-(+21.007x)+40=0

We get rid of parentheses

-21.007x+40=0

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

-21.007x=-40

x=-40/-21.007

x=1+4.7565740045079/5.2609566741798

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