3.8x+9=1.8x+15

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Solution for 3.8x+9=1.8x+15 equation: 



3.8x+9=1.8x+15

We move all terms to the left:

3.8x+9-(1.8x+15)=0

We get rid of parentheses

3.8x-1.8x-15+9=0

We add all the numbers together, and all the variables

2x-6=0

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

2x=6

x=6/2

x=3

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