9x+15=2x+21

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Solution for 9x+15=2x+21 equation: 



9x+15=2x+21

We move all terms to the left:

9x+15-(2x+21)=0

We get rid of parentheses

9x-2x-21+15=0

We add all the numbers together, and all the variables

7x-6=0

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

7x=6

x=6/7

x=6/7

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