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

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



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

We move all terms to the left:

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

We add all the numbers together, and all the variables

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

We multiply parentheses

9x-3x-15-21=0

We add all the numbers together, and all the variables

6x-36=0

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

6x=36

x=36/6

x=6

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