Question

Answer 1

6:

a: =>x-3/4=18/8=9/4

=>x=9/4+3/4=3

b: =>7/8:x=5/2

=>x=7/8:5/2=7/8*2/5=14/40=7/40

c: =>x+1/6=3/4

=>x=3/4-1/6=9/12-2/12=7/12

Answer 2

`@` `\text {Ans}`

`\downarrow`

`5,`

`a)`

\(x+2\dfrac{3}{4}=5\dfrac{2}{3}\)

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

`=> x = 17/3 - 11/4`

`=> x = 35/12`

Vậy, `x = 35/12`

`b)`

\(x-1\dfrac{4}{5}=3\dfrac{2}{7}\)

`=> x = 3 2/7 + 1 4/5`

`=> x = 23/7 + 9/5`

`=> x = 178/35`

`c)`

\(x\times3\dfrac{1}{2}=4\dfrac{3}{4}\)

`=> x = 4 3/4 \div 3 1/2`

`=> x = 19/4 \div 7/2`

`=> x = 19/14`

Vậy, `x = 19/14`

`d)`

\(x\div2\dfrac{2}{3}=4\dfrac{1}{3}\)

`=> x = 4 1/3 \times 2 2/3`

`=> x = 13/3 \times 8/3`

`=> x = 104/9`

Vậy, `x = 104/9`

`6,`

`a)`

`x - 3/4 = 6 \times 3/8`

`=> x - 3/4 = 9/4`

`=> x = 9/4 + 3/4`

`=> x = 11/4`

Vậy,` x = 11/4`

`b)`

`7/8 \div x = 3 - 1/2`

`=> 7/8 \div x = 5/2`

`=> x = 7/8 \div 5/2`

`=> x = 7/20`

Vậy, `x = 7/20`

`c)`

`x + 1/2 \times 1/3 = 3/4`

`=> x + 1/6 = 3/4`

`=> x = 3/4 - 1/6`

`=> x = 7/12`

Vậy, `x = 7/12.`