-9+3(4x-5)=21

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Solution for -9+3(4x-5)=21 equation: 



-9+3(4x-5)=21

We move all terms to the left:

-9+3(4x-5)-(21)=0

We add all the numbers together, and all the variables

3(4x-5)-30=0

We multiply parentheses

12x-15-30=0

We add all the numbers together, and all the variables

12x-45=0

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

12x=45

x=45/12

x=3+3/4

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