40=10(x+9)

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Solution for 40=10(x+9) equation: 



40=10(x+9)

We move all terms to the left:

40-(10(x+9))=0



We calculate terms in parentheses: -(10(x+9)), so:

10(x+9)

We multiply parentheses

10x+90

Back to the equation:

-(10x+90)



We get rid of parentheses

-10x-90+40=0

We add all the numbers together, and all the variables

-10x-50=0

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

-10x=50

x=50/-10

x=-5

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