TK

50 : x + 35 : x = 5

(  50 + 35 ) : x = 5

85 : x = 5

x = 85 : 5

x = 17

\(50:x+35:x=5\\ \Rightarrow\left(50+35\right):x=5\\ \Rightarrow85:x=5\\ \Rightarrow x=85:5\\ \Rightarrow x=17\)

\(A\)

A

35 x 50 + 35 x 49 + 35

= 35 x ( 50 + 49 + 1 )

= 35 x  100 

= 3500

35 x 50 + 35 x 49 + 35 = 35 x ( 50 + 49 + 1 ) 

                                 = 35 x           100

                                 =           3500

\(\frac{x}{50}\)= \(\frac{1}{10}\)

\(\frac{x}{50}\)= \(\frac{5}{50}\)

=> x= 5

Vậy x=5

\(\frac{35}{x}\)= \(\frac{5}{6}\)

\(\frac{35}{x}\)= \(\frac{35}{42}\)

=> x=42

Vậy x=42

\(\frac{x}{50}=\frac{1}{10}\)

\(\frac{x}{50}=\frac{5}{50}\)

\(\Rightarrow x=5\)

vậy \(x=5\)

\(\frac{35}{x}=\frac{5}{6}\)

\(\frac{35}{x}=\frac{35}{42}\)

\(\Rightarrow x=42\)

50 : x + 35 : x = 5

(50 + 35) : x = 5

85 : x = 5

x = 85 : 5

x = 17 

(50+35) : x = 5

=> 85x=5

=> x = 17

 35 x ( 50 + 49 + 1 ) 

= 35 x 100

= 3500

gửi kb cho tớ nhé 

35*50+35*49+35

=35*50+35*49+35*1

=35*(50+49+1)

=35*100

=3500

Tk nha

35 x 50 - 35 x 49 + 3

= 36 x (50 + 49) + 3

= 36 x 99 + 3

= 3564 + 3

= 3567

35 x 50 - 35 x 49 + 3

=35x(50-49)+3

=35x1+3

=35+3  

=38

x = 35/50- 3/7

x= 19/70