Question

[Trần Hà Phương]

Làm giúp bài 1,2

Answer 1

[Nguyễn Lê Phước Thịnh]

Bài 2: 

a: =>124x=4464

hay x=36

b: =>y=2652:26=102

c: \(\Leftrightarrow x\cdot\dfrac{1}{2}=\dfrac{2}{3}\)

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

d: \(\Leftrightarrow x=\dfrac{5}{2}\cdot\dfrac{4}{5}=2\)

e: \(\Leftrightarrow x\cdot2=\dfrac{22}{5}\)

hay x=11/5

f: \(\Leftrightarrow\dfrac{26}{5}-x=\dfrac{225}{45}=5\)

hay x=1/5

g: \(\Leftrightarrow x:\dfrac{3}{4}=\dfrac{9}{14}-\dfrac{2}{14}=\dfrac{1}{2}\)

hay x=3/8

h: \(\Leftrightarrow x\cdot\dfrac{1}{4}=\dfrac{2}{3}\)

\(\Leftrightarrow x=\dfrac{2}{3}:\dfrac{1}{4}=\dfrac{8}{3}\)

Answer 2

[Nguyễn Ngọc Khánh Huyền]

Bài 2:

a) \(124\times x=4829-365\) 
    \(124\times x=4464\)
               \(x=4464:124\)
               \(x=36\)

b) \(2652:y=26\)
                \(y=2652:26\)
                \(y=102\)

c) \(x\times\dfrac{1}{2}=1-\dfrac{1}{3}\)
    \(x\times\dfrac{1}{2}=\dfrac{2}{3}\)
    \(x=\dfrac{2}{3}:\dfrac{1}{2}\)
   \(x=\dfrac{4}{3}\) 

d) \(x:\dfrac{4}{5}=\dfrac{5}{2}\)
    \(x=\dfrac{5}{2}\times\dfrac{4}{5}\)
    \(x=2\)

e) \(x\times\dfrac{2}{3}+x\times\dfrac{4}{3}=\dfrac{22}{5}\)
    \(x\times\left(\dfrac{2}{3}+\dfrac{4}{3}\right)=\dfrac{22}{5}\)
    \(x\times2=\dfrac{22}{5}\)
    \(x=\dfrac{22}{5}:2\)
    \(x=\dfrac{11}{5}\)

f) \(\dfrac{26}{5}-x=\dfrac{9}{15}\times\dfrac{25}{3}\)
   \(\dfrac{26}{5}-x=5\)
             \(x=\dfrac{26}{5}-5\)
             \(x=\dfrac{1}{5}\)

g) \(x:\dfrac{3}{4}=\dfrac{9}{14}-\dfrac{1}{7}\)
    \(x:\dfrac{3}{4}=\dfrac{1}{2}\)
    \(x=\dfrac{3}{4}\times\dfrac{1}{2}\)
    \(x=\dfrac{3}{8}\)

h) \(x\times\dfrac{1}{2}-x\times\dfrac{1}{4}=\dfrac{2}{3}\)
    \(x\times\left(\dfrac{1}{2}-\dfrac{1}{4}\right)=\dfrac{2}{3}\)
    \(x\times\dfrac{1}{4}=\dfrac{2}{3}\)
    \(x=\dfrac{2}{3}:\dfrac{1}{4}\)
    \(x=\dfrac{8}{3}\)