Question

cac ban giup mik voi a

Answer 1

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`a)`

`-3x - 3/4 = 6/5`

`=> -3x = 6/5 + 3/4`

`=> -3x = 39/20`

`=> x = 39/20 \div (-3)`

`=> x = -13/20`

Vậy, `x=-13/20`

`b)`

`1/7 - 3/5x = 3/5`

`=> 3/5x = 1/7 - 3/5`

`=>3/5x = -16/35`

`=> x = -16/35 \div 3/5`

`=> x = -16/21`

`c)`

`3/7 - 1/2x = 5/3`

`=> 1/2x = 3/7 - 5/3`

`=> 1/2x = -26/21`

`=> x = -26/21 \div 1/2`

`=> x = -52/21`

Vậy, `x = -52/21`

`d)`

`-2/3x + 2 = 3/4`

`=> -2/3x = 3/4 - 2`

`=> -2/3x = -5/4`

`=> x = -5/4 \div (-2/3)`

`=> x = 15/8`

Vậy, `x=15/8.`