x+3=5x+15

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Solution for x+3=5x+15 equation: 



x+3=5x+15

We move all terms to the left:

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

We get rid of parentheses

x-5x-15+3=0

We add all the numbers together, and all the variables

-4x-12=0

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

-4x=12

x=12/-4

x=-3

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