x+(-3x)-1=12

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Solution for x+(-3x)-1=12 equation: 



x+(-3x)-1=12

We move all terms to the left:

x+(-3x)-1-(12)=0

We add all the numbers together, and all the variables

x+(-3x)-13=0

We get rid of parentheses

x-3x-13=0

We add all the numbers together, and all the variables

-2x-13=0

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

-2x=13

x=13/-2

x=-6+1/2

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