-3(5x-4)+9=-15x+21

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Solution for -3(5x-4)+9=-15x+21 equation: 



-3(5x-4)+9=-15x+21

We move all terms to the left:

-3(5x-4)+9-(-15x+21)=0

We multiply parentheses

-15x-(-15x+21)+12+9=0

We get rid of parentheses

-15x+15x-21+12+9=0

We add all the numbers together, and all the variables

=0

x=0/1

x=0

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