Đáp án: `x = 212/109`
Giải thích các bước giải:
`(-2) . (x - 3) - 4/5 . (x - 1/2) = 5/6 . x - 2/3`
`⇒ -2x + 6 - 4/5 . x + 2/5 = 5/6 . x - 2/3`
`⇒ (-2x - 4/5 . x) + (6 + 2/5) = 5/6 . x - 2/3`
`⇒ (-2 - 4/5) . x + (30/5 + 2/5) = 5/6 . x - 2/3`
`⇒ (-10/5 - 4/5) . x + 32/5 = 5/6 . x - 2/3`
`⇒ (-14/5) . x + 32/5 = 5/6 . x - 2/3`
`⇒ (-14/5) . x - 5/6 . x = (-2/3) - 32/5`
`⇒ (-14/5 - 5/6) . x = (-10/15) - 96/15`
`⇒ (-84/30 - 25/30) . x = -106/15`
`⇒ (-109/30) . x = -106/15`
`⇒ x = (-106/15) : (-109/30)`
`⇒ x = (-106/15) . (-30/109)`
`⇒ x = 212/109`
Vậy `x = 212/109`
