15x+9=12x+72

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Solution for 15x+9=12x+72 equation: 



15x+9=12x+72

We move all terms to the left:

15x+9-(12x+72)=0

We get rid of parentheses

15x-12x-72+9=0

We add all the numbers together, and all the variables

3x-63=0

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

3x=63

x=63/3

x=21

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