3-1x=5x+21

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Solution for 3-1x=5x+21 equation: 



3-1x=5x+21

We move all terms to the left:

3-1x-(5x+21)=0

We get rid of parentheses

-1x-5x-21+3=0

We add all the numbers together, and all the variables

-6x-18=0

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

-6x=18

x=18/-6

x=-3

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