1x+15=3x-15

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Solution for 1x+15=3x-15 equation: 



1x+15=3x-15

We move all terms to the left:

1x+15-(3x-15)=0

We add all the numbers together, and all the variables

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

We get rid of parentheses

x-3x+15+15=0

We add all the numbers together, and all the variables

-2x+30=0

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

-2x=-30

x=-30/-2

x=+15

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