Question

Tìm x :

a, X x 2 + X x 3 = 4

b, X x 9 - X x 5 = 23

giúp mk gấp với

tinh rõ ra hộ mk luôn nha

Answer 1

a) X x 2 + X x 3 = 4

 X x (2 + 3) = 4

X x 5 = 4

      x = 4 : 5

      x = 0,8

b) X x 9 - X x 5 = 23

X x (9 - 5) = 23

X x 4 = 23

     X = 23 : 4

     X = 5,75

Answer 2

a, 2x+3x=4 \(\Rightarrow\)5x=4 =>x=\(\frac{4}{5}\)

b, 9x-5x=23 => 4x=23 => x=\(\frac{23}{4}\)

Answer 3

a) X x 2+X x 3=4

   X x(2+3)      =4

 X x 5=4

x=4:5

x= 4/5=0,8

b) X x 9- X x 5=23

   X x (9-5)       =23

 X x 4              = 23

                   x=23:4

                x = 23/3

Answer 4

a,X x 2+Xx3=4

Xx(2+3)=4

Xx5=4

X=4:5

X=4/5

Answer 5

a,Xx2+Xx3=4

     Xx(2+3)=4

           Xx5=4

               X=4:5

               X=0.8

b,Xx9-Xx5=23

     Xx(9-5)=23

           Xx4=23

               X=23:4

               X=5.75

Answer 6

a,x.2+x.3+4

x.[2+3]=4

x.5=4

x=4chia5

x=0,8

Answer 7

b,Xx9-Xx5=23

Xx(9-5)=23

Xx4=3

X=3:4

X=3/4

Answer 8

a, X x 2 +X x3 =4

    X x ( 2+3)=4

    X x   5 =4 

         X = 4: 5

          X = 0,8

b, X x 9 - X x 5 = 23

   X x ( 9-5) =23

   X x 4 = 23 

        X = 23 : 4 

        X =    5,75