21x+39=8x

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Solution for 21x+39=8x equation: 



21x+39=8x

We move all terms to the left:

21x+39-(8x)=0

We add all the numbers together, and all the variables

13x+39=0

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

13x=-39

x=-39/13

x=-3

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