40=4(x-3)

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Solution for 40=4(x-3) equation: 



40=4(x-3)

We move all terms to the left:

40-(4(x-3))=0



We calculate terms in parentheses: -(4(x-3)), so:

4(x-3)

We multiply parentheses

4x-12

Back to the equation:

-(4x-12)



We get rid of parentheses

-4x+12+40=0

We add all the numbers together, and all the variables

-4x+52=0

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

-4x=-52

x=-52/-4

x=+13

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