15x=3x-21

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Solution for 15x=3x-21 equation: 



15x=3x-21

We move all terms to the left:

15x-(3x-21)=0

We get rid of parentheses

15x-3x+21=0

We add all the numbers together, and all the variables

12x+21=0

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

12x=-21

x=-21/12

x=-1+3/4

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