Question

Tìm X :

A,2/5+X=8/10                                      B,x-4/7=3/5

Answer 1

a) 2/5+x=8/10

  x=8/10-2/5

  x=2/5

 vậy x=2/5

b) x-4/7=3/5

 x=3/5+4/7

 x=41/35

 vậy x=41/35

Answer 2

a, \(\frac{2}{5}+x=\frac{8}{10}\)

x=\(\frac{8}{10}-\frac{2}{5}\)

x=\(\frac{2}{5}\)

b,\(x-\frac{4}{7}=\frac{3}{5}\)

x= \(\frac{3}{5}+\frac{4}{7}\)

x=\(\frac{41}{35}\)

Answer 3

a) 2/5+x=8/10

    x       =8/10-2/5

    x       = 2/5

b) x-4/7=3/5

   x      =3/5+4/7

  x       =41/35

Answer 4

a,2/5+x=8/10

x=8/10-2/5

x=2/5

vay x=2/5

b,x-4/7=3/5

x=3/5+4/7

x=41/35

vay x=41/35

Answer 5

a) 2/5+x=8/10

  x=8/10-2/5

 x=2/5

 vậy x=2/5

 b)x-4/7=3/5

x=3/5+4/7

x=41/35

vậy x=41/35