3x-15=3(1+2x)

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Solution for 3x-15=3(1+2x) equation: 



3x-15=3(1+2x)

We move all terms to the left:

3x-15-(3(1+2x))=0

We add all the numbers together, and all the variables

3x-(3(2x+1))-15=0



We calculate terms in parentheses: -(3(2x+1)), so:

3(2x+1)

We multiply parentheses

6x+3

Back to the equation:

-(6x+3)



We get rid of parentheses

3x-6x-3-15=0

We add all the numbers together, and all the variables

-3x-18=0

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

-3x=18

x=18/-3

x=-6

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