-3(7x-5)=21x+15

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Solution for -3(7x-5)=21x+15 equation: 



-3(7x-5)=21x+15

We move all terms to the left:

-3(7x-5)-(21x+15)=0

We multiply parentheses

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

We get rid of parentheses

-21x-21x-15+15=0

We add all the numbers together, and all the variables

-42x=0

x=0/-42

x=0

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