Question

140 : ( x - 8 ) = 7

720 : ( 41 - x ) = 2 mũ 3 . 5

Answer 1

`140:(x-8)=7`

`=>x-8=140:7`

`=>x-8=20`

`=>x=20+8`

`=>x=28`

``

`720:(41-x)=2^{3}.5`

`=>720:(41-x)=8.5=40`

`=>41-x=720:40=18`

`=>x=41-18`

`=>x=23`

Answer 2

+) \(140:\left(x-8\right)=7\)

\(\Leftrightarrow x-8=20\)

\(\Leftrightarrow x=28\)

+) \(720:\left(41-x\right)=2^3.5\)

\(\Leftrightarrow41-x=18\)

\(\Leftrightarrow x=23\)

Answer 3

tổng 2 số chẵn liên tiếp bằng 30 . Tìm 2 số đó 

 

Answer 4

140 : ( x-8 ) = 7

         ( x-8 ) = 140 : 7

           x-8   = 20

           x      = 20+3

          x       =28

720 : ( 41-x ) = 2³.5

720 : ( 41-x ) = 8.5

720 : ( 41-x ) = 40

         ( 41-x ) = 720 : 40 

            41-x  = 18

                  x = 41-18

                  x = 23

 

 

Answer 5

x = 23