1x-9=4(x+3)

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Solution for 1x-9=4(x+3) equation: 



1x-9=4(x+3)

We move all terms to the left:

1x-9-(4(x+3))=0

We add all the numbers together, and all the variables

x-(4(x+3))-9=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

x-4x-12-9=0

We add all the numbers together, and all the variables

-3x-21=0

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

-3x=21

x=21/-3

x=-7

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