a)
`vì` `x - y - z = 33`
`nên` `x > y > z, x > z`
`x/3 = z/4`
mà `z < z`
`x/3 = z/4`
`= MSC: 12`
`= x.4/12 = z.3/12`
`khi` `này` `x = z` ( `đã` `quy` `đồng` )
`y > z`
`y/2 = z/3`
`MSC: 6`
`y.3/6 = z.2/6`
`y = z` ( `đã` `quy` `đồng` )
b)
`x/2 = y/5`
`MSC: 10`
`x.5/10 = y.2/10`
`x = y` `( đã` `quy` `đồng )`
`x < y`
`y/3 = z/2`
`MSC: 6`
`y.2/6 = z.3/6`
`y > z`
`⇒ y < x < z`
và:
`2x + 3y - 4z = 34`
`(2 + 3 - 4) . xyz = 34`
`2 . xyz = 34`
`34 : 2 = 17`
