Câu 1: \(\frac{17}{51}\)x \(\frac{45}{30}\)= \(\frac{1}{3}\)x \(\frac{3}{2}\)

                                   = \(\frac{1}{2}\).

Câu 2: \(\frac{24}{15}\)x \(\frac{56}{72}\)x \(\frac{10}{14}\)= \(\frac{8}{5}\)x \(\frac{7}{9}\)x \(\frac{5}{7}\)

                                                 = \(\frac{56}{45}\)x \(\frac{5}{7}\)

                                                 = \(\frac{8}{9}\)

Câu 3: \(\frac{32}{48}\times\frac{35}{21}\times\frac{63}{14}\times\frac{9}{30}=\frac{2}{3}\times\frac{5}{3}\times\frac{9}{2}\times\frac{3}{10}=\frac{3}{2}\)

k nha

a)17/51x45/40=1/3x3/2=3/6=1/2

b)24/15x56/72x10/14=8/5x7/9x5/7=8/9

c)32/48x35/21x63/14x9/30=2/3x5/3x9/2x3/10=3/2

x x 134 -x x24 -x x 10 = x x ( 134 - 24 - 10)

x = x x 100

x = 1300 : 100

x = 13

x=4830000

Chúc bạn học tốt nha

x = 23 x 35 x 60 x 10 x 10

x = 4830000

= 4830000

NHA BẠN

a)  x 6 = − 1 2 ⇒ x 6 = − 3 6 ⇒ x = − 3

b)  x 10 = 3 5 ⇒ x 10 = 6 10 ⇒ x = 6

a)  x   ∈ ∅

b) x = -2

c) x = -6

d) x = -15

e) x = 2 hoặc x = -2

f) x = 5 hoặc x = -5

=10000000000

Hok tốt

k mk nha!!

10000000000

10 x10 =100

P=50% x4/3 x10/7/35  x 0,75

P=1/2x4/3x357/35x3/4

P=4x357x3/2x3x35x4

P=357/70

P=51/10

\(P=50\%\cdot\frac{4}{3}\cdot10\frac{7}{35}\cdot0,75\)

\(P=\frac{1}{2}\cdot\frac{4}{3}\cdot\frac{51}{5}\cdot\frac{3}{4}\)

\(P=\frac{1\cdot4\cdot51\cdot3}{2\cdot3\cdot5\cdot4}=\frac{51}{2\cdot5}=\frac{51}{10}\)

\(P=\frac{51}{10}\)

a)(x-15)=0     

x=15

Vậy c=15

b)(x-10)=1

x=11

Vậy x=11

c)(x-5)(x-7)=0

x=5 hoặc x=7

Vậy \(x\in\left\{5;7\right\}\)

chuột canh

em iu oi 

em chep sai de roi

ket qua la 22121944

k anh nha 

anh muon chich em qua

a: =>2x+17=27

=>2x=27-17=10

=>x=5

b: =>2(19-x)=24

=>19-x=12

=>x=7

\(2\cdot x+17=3^5:3^2\)

\(\Rightarrow2\cdot x+17=3^3\)

\(\Rightarrow2\cdot x+17=27\)

\(\Rightarrow2\cdot x=27-17\)

\(\Rightarrow2\cdot x=10\)

\(\Rightarrow x=\dfrac{10}{2}\)

\(\Rightarrow x=5\)

___________

\(\left(19-x\right)\cdot2-20=4\)

\(\Rightarrow\left(19-x\right)\cdot2=24\)

\(\Rightarrow19-x=24:2\)

\(\Rightarrow19-x=12\)

\(\Rightarrow x=19-12\)

\(\Rightarrow x=7\)