4x-9=19x-21

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Solution for 4x-9=19x-21 equation: 



4x-9=19x-21

We move all terms to the left:

4x-9-(19x-21)=0

We get rid of parentheses

4x-19x+21-9=0

We add all the numbers together, and all the variables

-15x+12=0

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

-15x=-12

x=-12/-15

x=4/5

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