=\(\frac{17}{25}\)

17/25

\(\frac{17}{25}\times\frac{11}{28}+\frac{34}{50}\times\frac{17}{28}=\frac{187}{700}+\frac{289}{700}=\frac{17}{25}\)

\(\frac{17}{25}\cdot\frac{11}{28}+\frac{34}{50}\cdot\frac{17}{28}\)

\(=\frac{187}{700}+\frac{578}{1400}\)

=\(\frac{952}{1400}\)

=\(\frac{119}{175}\)

28 x 17 + 101 x 3 + 73 x 17 = 17 x (28 + 73) + 101 x 3

= 17 x 101 + 101 x 3

= 101 x (17 + 3)

= 101 x 20

= 2020

  28 x 17 + 101x 3 + 73 x 17 

= 17x ( 28 + 73 ) + 101 x 3 

= 101 x 17  + 101x 3 

= 101x( 17 + 3)

= 101 x 20

= 2020

\(\frac{31}{53}.\frac{17}{28}+\frac{31}{28}.\frac{11}{53}\)

\(=\frac{31}{53}.\frac{17}{28}+\frac{11}{28}.\frac{31}{53}\)

\(=\frac{31}{53}.\left(\frac{17}{28}+\frac{11}{28}\right)\)

\(=\frac{31}{53}.1\)

\(=\frac{31}{53}\)

\(\frac{31}{53}\times\frac{17}{28}+\frac{31}{28}\times\frac{11}{53}\)

\(=\frac{31}{53}\times\frac{17}{28}+\frac{31}{53}\times\frac{11}{28}\)

\(=\frac{31}{53}\times\left(\frac{17}{28}+\frac{11}{28}\right)\)

\(=\frac{31}{53}\times1\)

\(=\frac{31}{53}\)

\(\frac{31}{53}.\frac{17}{28}+\frac{31}{28}.\frac{11}{53}=\frac{31}{53}.\frac{17}{28}+\frac{31}{53}.\frac{11}{28}\)

 \(=\frac{31}{53}.\left(\frac{17}{28}+\frac{11}{28}\right)=\frac{31}{53}.1=\frac{31}{53}.\)

56−x=28

x=56−28

x=28

x−17=73

x=73 + 17

x=90

a) y x 47 = 2961

y = 2961 : 47

y = 63

A 

a)\(47y=2961\)

⇔\(y=63\)

b)\(y:32=243\left(\text{dư 17}\right)\) 

⇔\(y:32=260\)

⇔\(y=8320\)

c)\(17y+28y-13y=1728\)

⇔\(32y=1728\)

⇔\(y=54\)

a) ( 36 x 28 + 36 x 45 ) : 73

= 36 x (28 + 45 ):73

=36 x 73 :73

= 36 x (73 : 73)

= 36 x 1

= 36

b) ( 98 x 17 - 26 x 17 ) : 72

= 17 x (98-17):72

= 17 x 72 :72

=17 x (72 :72)

= 17 x 1

= 17

a) ( 36 x 28 + 36 x 45 ) : 73 = 36 

b) ( 98 x 17 - 26 x 17 ) : 72 = 17 

Bạn phải giải hẳn ra

x-17=5-28

x-17=(-23)

x=(-23)+17

x=(-6)

x - 17 = 5 - 28 

x - 17 =  -23

      x = -23 + 17

      x = -6

=> x = -6

x - 17 =5 -28

x - 17 =(-23)

x       =(-23)+17

x       =(-6)