Đáp án:
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`e,`
`(-22)/15x + 1/3 = |-2/3 + 1/5|`
`↔ (-22)/15x + 1/3 = |-10/15 + 3/15|`
`↔ (-22)/15x + 1/3 = |-7/15|`
`↔ (-22)/15x + 1/3 = 7/15`
`↔ (-22)/15x = 7/15 - 1/3`
`↔ (-22)/15x = 7/15 - 5/15`
`↔ (-22)/15x = 2/15`
`↔ x = 2/15 ÷ (-22)/15`
`↔ x = 2/15 × (-15)/22`
`↔ x = (-1)/11`
Vậy `x=(-1)/11`
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`f,`
`3/4x - 1/2 = 3/7`
`↔ 3/4x = 3/7 + 1/2`
`↔ 3/4x = 6/14 + 7/14`
`↔ 3/4x = 13/14`
`↔ x = 13/14 ÷ 3/4`
`↔ x = 13/14 × 4/3`
`↔ x = 26/21`
Vậy `x=26/21`
