15=3(3+x)+3x

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Solution for 15=3(3+x)+3x equation:



15=3(3+x)+3x
We move all terms to the left:
15-(3(3+x)+3x)=0
We add all the numbers together, and all the variables
-(3(x+3)+3x)+15=0
We calculate terms in parentheses: -(3(x+3)+3x), so:
3(x+3)+3x
We add all the numbers together, and all the variables
3x+3(x+3)
We multiply parentheses
3x+3x+9
We add all the numbers together, and all the variables
6x+9
Back to the equation:
-(6x+9)
We get rid of parentheses
-6x-9+15=0
We add all the numbers together, and all the variables
-6x+6=0
We move all terms containing x to the left, all other terms to the right
-6x=-6
x=-6/-6
x=1

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