3x+9=2.5x+15

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Solution for 3x+9=2.5x+15 equation: 



3x+9=2.5x+15

We move all terms to the left:

3x+9-(2.5x+15)=0

We get rid of parentheses

3x-2.5x-15+9=0

We add all the numbers together, and all the variables

0.5x-6=0

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

0.5x=6

x=6/0.5

x=12

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