2(x+6)+15=21

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Solution for 2(x+6)+15=21 equation: 



2(x+6)+15=21

We move all terms to the left:

2(x+6)+15-(21)=0

We add all the numbers together, and all the variables

2(x+6)-6=0

We multiply parentheses

2x+12-6=0

We add all the numbers together, and all the variables

2x+6=0

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

2x=-6

x=-6/2

x=-3

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