10x+15=9x+21

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Solution for 10x+15=9x+21 equation: 



10x+15=9x+21

We move all terms to the left:

10x+15-(9x+21)=0

We get rid of parentheses

10x-9x-21+15=0

We add all the numbers together, and all the variables

x-6=0

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

x=6

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