40=4(9+z)

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Solution for 40=4(9+z) equation: 



40=4(9+z)

We move all terms to the left:

40-(4(9+z))=0

We add all the numbers together, and all the variables

-(4(z+9))+40=0



We calculate terms in parentheses: -(4(z+9)), so:

4(z+9)

We multiply parentheses

4z+36

Back to the equation:

-(4z+36)



We get rid of parentheses

-4z-36+40=0

We add all the numbers together, and all the variables

-4z+4=0

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

-4z=-4

z=-4/-4

z=1

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