Question

Các pạn ưi, giúp mik!!!

Answer 1

\(a,x+\dfrac{2}{5}=\dfrac{1}{2}\\ x=\dfrac{1}{2}-\dfrac{2}{5}\\ x=\dfrac{1}{10}\\b,x=\dfrac{2}{5}+\dfrac{3}{7}\\ x=\dfrac{29}{35}\\ c,=\dfrac{19}{20}-\dfrac{8}{5}\\ x=\dfrac{-13}{20} \)

Answer 2

a: x+2/5=1/2

=>x=1/2-2/5=5/10-4/10=1/10

b: x-3/7=2/5

=>x=2/5+3/7=14/35+15/35=29/35

c: 19/20-x=8/5

=>x=19/20-8/5=19/20-32/20=-13/20

Answer 3

a. x + 2/5 = 1/2 

    x           = 1/2 - 2/5

    x            = 1/10

b. x - 3/7 = 2/5

    x          = 2/5 + 3/7

    x           = 29/35

c. 19/10 - x = 8/5 - 3/4

                x = 19/20 + 3/4 + 8/5 = 19/20 + 15/20 + 32/20

                x = 2/10 = 1/10

 

Answer 4

là kết quả của tui đúng nha

Answer 5

a. x + 2/5 = 1/2 

    x = 1/2 - 2/5

    x  = 1/10

b. x - 3/7 = 2/5

    x = 2/5 + 3/7

    x  = 29/35

c. 19/10 - x = 8/5 - 3/4

     x = 19/20 + 3/4 + 8/5 = 19/20 + 15/20 + 32/20