a) \(x+\dfrac{4}{5}=\dfrac{45}{5}-\left(\dfrac{3}{7}+\dfrac{3}{5}\right)\)

   \(x+\dfrac{4}{5}=\dfrac{45}{5}-\dfrac{36}{35}\)

  \(x+\dfrac{4}{5}=\dfrac{279}{35}\)

  \(x=\dfrac{279}{35}-\dfrac{4}{5}\)

  \(x=\dfrac{251}{35}\)

b) \(\dfrac{5}{8}\times x=\dfrac{4}{5}\)

            \(x=\dfrac{4}{5}\div\dfrac{5}{8}\)

            \(x=\dfrac{32}{25}\)

a) x + 4/5 = 45/5 - (3/7 + 3/5)
    x + 4/5 = 45/5 - 36/35

    x + 4/5 = 279/35

           x   = 279/35 - 4/5

           x   = 251/35

vậy x =...

b) 5/8 x X = 4/5 

             X = 5/8 : 4/5

             X = 32/25

vậy x =...

ĐỌC TIẾP CHO BÍT NHÉ

\(a,\dfrac{1}{2}\times\dfrac{1}{3}-\dfrac{1}{8}=\dfrac{1}{6}-\dfrac{1}{8}=\dfrac{4}{24}-\dfrac{3}{24}=\dfrac{1}{24}\\ b,\dfrac{5}{2}:\dfrac{1}{4}-\dfrac{1}{8}=\dfrac{5}{2}\times4-\dfrac{1}{8}=10-\dfrac{1}{8}=\dfrac{80}{8}-\dfrac{1}{8}=\dfrac{79}{8}\)

a) 1/6- 1/8

= 1/24

b) 5/2 x 4/1-1/8

= 20/2 - 1/8

= 10-1/8

= 79/8

a) 

5/6+3/6= 8/6 = 4/3

b)

6/36= 1/6

a) 4/3

b) 1/6

c) 37/15

d) 3

ĐỌC TIẾP Ý

\(a,\dfrac{7}{12}+\dfrac{3}{4}\times\dfrac{2}{9}=\dfrac{7}{12}+\dfrac{1}{6}=\dfrac{7}{12}+\dfrac{2}{12}=\dfrac{9}{12}=\dfrac{3}{4}\)

\(b,\dfrac{8}{9}-\dfrac{4}{15}:\dfrac{2}{5}=\dfrac{8}{9}-\dfrac{4}{15}\times\dfrac{5}{2}=\dfrac{8}{9}-\dfrac{2}{3}=\dfrac{8}{9}-\dfrac{6}{9}=\dfrac{2}{9}\)

đùa thì kệ con mẹ mày xàm loz

Đáp án a là 0,75 

Đáp án b: là 0.86222222222

ĐỌC TIẾP NHÉ

a: x=11/10-4/5=3/10

b: =3/7-2/7=1/7

a. x + 4/5 = 11/10 

   x           = 11/10 - 4/5

   x           = 3/10

b. 3/5 x 5/7 - 2/7

= 3/7 - 2/7

= 1/7