` 2/3 x - 3/(12) = 4/5 - (\frac{7}{x - 2}) `
` => 2/3 x + 7/(x - 2) = 4/5 + 3/(12) `
` => \frac{2x - 4 + 21}{3(x - 2)} = (48)/(60) + (15)/(60) `
` => \frac{2x + 17}{3(x - 2)} = (21)/(20) `
` => 20(2x + 17) = 21.3(x - 2) `
` => 40x + 340 = 63x - 126 `
` => 63x - 40x = 126 + 340 `
` => 13x = 466 `
` => x = (466)/(13) `
Vậy ` x = (466)/(13) `