35 x 26 + 65 x 59 + 34 x 35 + 51 x 65

= 35 x ( 26 + 34 ) + 65 x ( 51 + 59 )

= 35 x 60 + 65 x 110

= 2100 + 7150

= 9250

   35 x 26 + 65 x 59 + 34 x 35 + 51 x 65

= 35 (26 + 34) + 65 (59 + 51)

= 35 x 60 + 65 x 110

= 2100 + 7150

= 9250

\(35x26+65x59+34x35+51x65=8791\)

\(K\)\(nha!!!\)

1690

1690

1690

\(\dfrac{x}{5}=\dfrac{26}{65}\)

\(\dfrac{x}{5}=\dfrac{2}{5}\)

\(x=2\)

______________________________________________

\(\dfrac{3}{x}=\dfrac{51}{85}\)

\(\dfrac{3}{x}=\dfrac{3}{5}\)

`x=5`

\(+,\dfrac{x}{5}=\dfrac{26}{65}\\ =>x=\dfrac{5\times26}{65}=2\\+, \dfrac{3}{x}=\dfrac{51}{85}\\ =>x=\dfrac{3\times85}{51}=5\)

\(a,\dfrac{x}{3}=\dfrac{10}{15}\\ \Rightarrow\dfrac{x}{3}=\dfrac{2}{3}\\ \Rightarrow x=2\\ b,\dfrac{x}{5}=\dfrac{26}{65}\\ \Rightarrow\dfrac{x}{5}=\dfrac{2}{5}\\ \Rightarrow x=2\)

a, \(\dfrac{x}{3}=\dfrac{10}{15}\Leftrightarrow\dfrac{5x}{15}=\dfrac{10}{15}\Rightarrow x=2\)

b, \(\dfrac{x}{5}=\dfrac{26}{65}\Leftrightarrow\dfrac{13x}{65}=\dfrac{26}{65}\Rightarrow x=2\)

\(\dfrac{x}{5}=\dfrac{26}{65}\)

\(\Leftrightarrow65x=130\)

\(\Leftrightarrow x=2\)

\(\dfrac{3}{x}=\dfrac{51}{85}\)

\(\Leftrightarrow51x=255\)

\(\Leftrightarrow x=5\)

`x/5=26/65`

`65xx x=5xx26`

`65xx x=130`

`x=130:65=2`

`3/x=51/85`

`51xx x=3xx85`

`51xx x=255`

`x=255:51=5`

\(\dfrac{26x5}{65}=2\)

⇒ x = 2

\(\dfrac{85x3}{51}=5\)

⇒ x=5

4x+9=-26-x

4x+x=-26-9

   5x=-35

   x=(-35):5

   x=-7

4x+9=-26-x

4x+x=-26-9

  5x =-35

   x =(-35):5

   x =-7

4x + 9 = -26-x

4x+x=-26-9

5x=-35

x=-35:5

x=-7

Vậy : x=-7

2x+3x=75

5x=75

x=75:5

x=15

Vậy : x=15

-x-2x=-50+65

-3x=15

x=15:(-3)

x=-5

Vậy : x=-5

CHO TỚ 3 TÍCH NHA !

\(\frac{x}{5}=\frac{26}{65}\)

\(x:5=\frac{26}{65}\)

    \(x=\frac{26}{65}\times5\)

    \(x=2\)

Vậy x = 2

x là

     5 x 26 : 65 = 2

 Vậy x = 2

2

tk minh nha

a) x thuộc B(13)={0,13,26,39,52,65,78,91,104,....}

Vì 26 < hoặc=x < hoặc =104 ==> x={39,52,65,78,91,104}

b) x thuộc Ư(65)={1,5,13,65}

Vì 12<x<75==> x={13,65}

c) x={13,65}