3x=2.5x+15

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Solution for 3x=2.5x+15 equation: 



3x=2.5x+15

We move all terms to the left:

3x-(2.5x+15)=0

We get rid of parentheses

3x-2.5x-15=0

We add all the numbers together, and all the variables

0.5x-15=0

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

0.5x=15

x=15/0.5

x=30

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