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`a) |x| - 7/6 = 4/15`
`-> |x| = 4/15 + 7/6`
`-> |x| = 43/30`
`-> x = ±43/30`
`b) |x - 4/3| = 1/6`
`-> x - 4/3 = 1/6` hoặc `x - 4/3 = -1/6`
`-> x = 1/6 + 4/3` hoặc `x = -1/6 + 4/3`
`-> x = 3/2` hoặc `x = 7/6`
`c) |x - 4/3| - 1/3 = 1/2`
`-> |x - 4/3| = 5/6`
`-> x - 4/3 = 5/6` hoặc `x - 4/3 = -5/6`
`-> x = 13/6` hoặc `x = 1/2`
`d) 8/3 - |7/9 - x| = -1/5`
`-> |7/9 - x| = 43/15`
`-> 7/9 - x = 43/15` hoặc `7/9 - x = -43/15`
`-> x = -94/45` hoặc `x = 164/45`
