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

\(\dfrac{x}{3}=\dfrac{1}{5}+\dfrac{1}{2}\)

\(\dfrac{x}{3}=\dfrac{7}{10}\)

\(10x=21\)

\(x=2,1\)

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

\(\dfrac{x}{3}=\dfrac{1}{5}+\dfrac{1}{2}\)

\(\dfrac{x}{3}=\dfrac{7}{10}\)

\(x=\dfrac{\left(7\cdot3\right)}{10}\)

\(x=\dfrac{21}{10}\)

ARE

ON

BAG

NEXT

NOT

Are

On

Bag

Next

Not

Pleaseeeeeee!

1 haven't cleaned

2 will be

3 is sleeping - gets

4 is teaching

5 does - isn't going - is watching

6 have written

7 hadn't disturbed

8 have you worked

9 get  - get

6 studies - are trying

7 had stood

8 drove

9 have you studied

10 have waited - hasn't come

11 have lived

|-2|=2x+3

<=> 2x+3=|-2|

=>2x+3=2

=>2x=2-3

=>2x=-1

=>x=\(\frac{-1}{2}\)

/ -2 / = 2x + 3

\(=>2=2x+3\)

\(=>-1=2x\)

\(=>-2x=1\)

\(=>x=\frac{-1}{2}\)

Ủng hộ mik nha

                   2x + 3 = |-2|

                   2x + 3 = 2

                    2x = 2 + 3

                    2x = 5

                       x = 5/2

                  ủng hộ mk nha!!!

-12.(x-5)+7.(3-x)=5

-12x-60+21-7x=5

(-12x-7x)-(60+21)=5

-19x-81=5

-19x=5-81

-19x=-76

x=-76:(-19)

x=4

x=

x=44:(-19)

\(-12\left(x-5\right)+7\left(3-x\right)=5\)

\(60-12x+21-7x=5\)

\(81-19x=5\)

\(19x=81-5\)

\(19x=76\)

\(x=4\)

bn trí sai ròi ender ms đúng đó

Ta có: \(n_{CH_3COOH}=\dfrac{60}{60}=1\left(mol\right)\)

a, PT: \(2CH_3COOH+K_2CO_3\rightarrow2CH_3COOK+CO_2+H_2O\)

_________1____________________1_________0,5 (mol)

b, V_CO2 = 0,5.22,4 = 11,2 (l)

c, m_CH3COOK = 1.98 = 98 (g)

Bạn tham khảo nhé!

a) PTHH:         2CH₃COOH + K₂CO₃ → 2CH₃COOK + CO₂↑ + H₂O

b) n_CH3COOH = \(\dfrac{m}{M}=\dfrac{60}{60}=1\left(mol\right)\)

Theo PTHH: n_CO2 = \(\dfrac{1}{2}\).n_CH3COOH = 0,5 (mol)

=> V_{CO2 (đktc)} = n.22,4 = 0,5.22,4 = 11,2 (lít)

c) Theo PTHH: n_CH3COOK = n_CH3COOH = 1 (mol)

=> m_CH3COOK = n.M = 1.98 = 98 (g)

Mặc dù hơi muộn nhưng mà chúc bạn thi đạt kết quả tốt nha ^_^