6(5x-3)=21x+9

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Solution for 6(5x-3)=21x+9 equation: 



6(5x-3)=21x+9

We move all terms to the left:

6(5x-3)-(21x+9)=0

We multiply parentheses

30x-(21x+9)-18=0

We get rid of parentheses

30x-21x-9-18=0

We add all the numbers together, and all the variables

9x-27=0

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

9x=27

x=27/9

x=3

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