| $|\dfrac{9}{4}x – \dfrac{4}{5}| = \dfrac{1}{2}$
| $|\dfrac{9}{4}x – \dfrac{4}{5}| = \dfrac{1}{2}$
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| $|\dfrac{9}{4}x – \dfrac{4}{5}| = \dfrac{1}{2}$
Acacia
`|9/4x – 4/5| = 1/2`
`⇔ 9/4x – 4/5 = 1/2` hoặc `9/4x – 4/5 = -1/2`
`⇔ 9/4x = 13/10` hoặc `9/4x = 3/10`
`⇔ x = 26/45` hoặc `x = 2/15`
Adela
`=> 9/4x-4/5=1/2` hoặc `9/4x-4/5=-1/2 `
`=> 9/4x=13/10` hoặc `9/4x=3/10`
`=> x=26/45` hoặc `x=2/15`