12x-19=4x+21

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Solution for 12x-19=4x+21 equation: 



12x-19=4x+21

We move all terms to the left:

12x-19-(4x+21)=0

We get rid of parentheses

12x-4x-21-19=0

We add all the numbers together, and all the variables

8x-40=0

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

8x=40

x=40/8

x=5

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