21x-3(5x+9)=7

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Solution for 21x-3(5x+9)=7 equation: 



21x-3(5x+9)=7

We move all terms to the left:

21x-3(5x+9)-(7)=0

We multiply parentheses

21x-15x-27-7=0

We add all the numbers together, and all the variables

6x-34=0

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

6x=34

x=34/6

x=5+2/3

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