15=-3(2x+1)

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



15=-3(2x+1)

We move all terms to the left:

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

6x+3+15=0

We add all the numbers together, and all the variables

6x+18=0

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

6x=-18

x=-18/6

x=-3

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