Hwhwhw9x – 7i > 9x – 21u​

`Aljabar

» 9x – 7i > 9x – 21u

» 9x – 7i – 9x > -21u

» 9x – 9x – 7i > -21u

» (9 – 9)x – 7i > -21u

» -7i > – 21u

» i <3 u

9x – 7i > 9x – 21u

-7i > -21u

7i < 21u

i <3 u