8x-21=4x+19

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Solution for 8x-21=4x+19 equation: 



8x-21=4x+19

We move all terms to the left:

8x-21-(4x+19)=0

We get rid of parentheses

8x-4x-19-21=0

We add all the numbers together, and all the variables

4x-40=0

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

4x=40

x=40/4

x=10

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