`\color{#9400D3}{-k} \color{#800080}{o} \color{#4B0082}{r} \color{#00008B}{e} \color{#0000CD}{a} \color{#0000FF}{a} \color{#1E90FF}{a-}`

`a) x - 5,02 = -3,01 `

`x = -3,01 + 5,02`

`x = 2,01`

Vậy `x = 2,01 `

`b) x : 3/4 = -5/12 `

`x = -5/12 × 3/4 `

`x = -15/48 `

`x = -5/16 `

Vậy `x = -5/16 `

`c) -5/6 × x - 7/4 = 2/3`

`-5/6 × x = 2/3 + 7/4 `

`-5/6 × x = 8/12 + 21/12 `

`-5/6 × x = 29/12`

`x = 29/12 : (-5/6) `

`x = 29/12 × (-6/5)`

`x = -174/60`

`x = -29/10`

Vậy `x = -29/10`

`d) 1 3/4 × x + 25% × x = -8/9 `

`7/4 × x + 1/4 × x = -8/9 `

`(7/4 + 1/4) × x = -8/9 `

`8/4 × x = -8/9 `

`2 × x = -8/9 `

`x = -8/9 : 2 `

`x = -4/9 `

Vậy `x = -4/9`