3x-21=8x+19

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Solution for 3x-21=8x+19 equation: 



3x-21=8x+19

We move all terms to the left:

3x-21-(8x+19)=0

We get rid of parentheses

3x-8x-19-21=0

We add all the numbers together, and all the variables

-5x-40=0

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

-5x=40

x=40/-5

x=-8

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