3x+5=3x-21x

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



3x+5=3x-21x

We move all terms to the left:

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

We add all the numbers together, and all the variables

3x-(-18x)+5=0

We get rid of parentheses

3x+18x+5=0

We add all the numbers together, and all the variables

21x+5=0

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

21x=-5

x=-5/21

x=-5/21

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