6+3(2x+1)=21

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Solution for 6+3(2x+1)=21 equation: 



6+3(2x+1)=21

We move all terms to the left:

6+3(2x+1)-(21)=0

We add all the numbers together, and all the variables

3(2x+1)-15=0

We multiply parentheses

6x+3-15=0

We add all the numbers together, and all the variables

6x-12=0

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

6x=12

x=12/6

x=2

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