15x-30=6x-21

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Solution for 15x-30=6x-21 equation: 



15x-30=6x-21

We move all terms to the left:

15x-30-(6x-21)=0

We get rid of parentheses

15x-6x+21-30=0

We add all the numbers together, and all the variables

9x-9=0

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

9x=9

x=9/9

x=1

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