5x-9-3x=18+15

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Solution for 5x-9-3x=18+15 equation: 



5x-9-3x=18+15

We move all terms to the left:

5x-9-3x-(18+15)=0

We add all the numbers together, and all the variables

5x-3x-9-33=0

We add all the numbers together, and all the variables

2x-42=0

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

2x=42

x=42/2

x=21

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