Question

Tìm x

a,x+1/2=3/4

b, 4/5.x=4/7

c, 8x= 7,8+25

Answer 1

a. x+1/2=3/4

    x        =3/4 - 1/2

    x       = 1/4

b. 4/5.x=4/7

 x           =4/7 : 4/5

 x           = 4/7 . 5/4

 x            = 5/7

c. 8x=7,8+25

8x=32,8

x= 32,8 : 8

x= 4,1

Answer 2

a) x=\(\frac{3}{4}-\frac{1}{2}\)

=\(\frac{1}{4}\)

b)x\(=\frac{4}{7}:\frac{4}{5}\)

x\(=\frac{4}{7}.\frac{5}{4}\)

x\(=\frac{5}{7}\)

c)8x= 32,8

x=4,1

Answer 3

a) x+1/2=3/4

          x=3/4-1/2

          x=1/4

b)4/5.x=4/7

         x=4/7: 4/5

        x=5/7

c) 8x=7,8+25

    8x=32.8

    x=32.8/8

   x=4.1