Tìm x trong các tỉ lệ thức sau:
a)
b) 4,5 : 0,3 = 2,25 : ( 0,1.x)
c)
d)
Tìm x trong các tỉ lệ thức sau:
4 , 5 : 0 , 3 = 2 , 25 : ( 0 , 1 . x )
Tìm x trong các tỉ lệ thức sau:
a, ( 1/3 . x ) : 2/3 = 7/4 : 2/5
b, 4,5 : 0,3 = 2,25 : ( 0,1 . x )
c, 8 : ( 1/4 . x ) = 2 : 0,02
d, 3 : 9/4 = 3/4 : ( 6 . x )
a) \(\left(\frac{1}{3}.x\right):\frac{2}{3}=\frac{7}{4}:\frac{2}{5}\)
\(\left(\frac{1}{3}.x\right):\frac{2}{3}=\frac{35}{8}\)
\(\Rightarrow\frac{1}{3}.x=\frac{35}{8}.\frac{2}{3}\)
\(\Rightarrow\frac{1}{3}.x=\frac{35}{12}\)
\(\Rightarrow x=\frac{35}{12}:\frac{1}{3}\)
\(\Rightarrow x=\frac{35}{4}\)
Vậy \(x=\frac{35}{4}\)
\(a.\left(\frac{1}{3}.x\right):\frac{2}{3}=\frac{7}{4}:\frac{2}{5}\)
\(\left(\frac{1}{3}.x\right):\frac{2}{3}=\frac{35}{8}\)
\(\left(\frac{1}{3}.x\right)=\frac{35}{8}.\frac{2}{3}\)
\(\left(\frac{1}{3}.x\right)=\frac{35}{12}\)
\(x=\frac{35}{12}:\frac{1}{3}\)
\(x=\frac{35}{4}\)
\(b.4,5:0,3=2,25:\left(0,1.x\right)\)
\(\Rightarrow2,25:\left(0,1.x\right)=4,5:0,3\)
\(2,25:\left(0,1.x\right)=15\)
\(2,25:\left(0,1.x\right)=2,25:15\)
\(\left(0,1.x\right)=0,15\)
\(x=0,15:0,1\)
\(x=1,5\)
\(c.8:\left(\frac{1}{4}.x\right)=2:0,02\)
\(8:\left(\frac{1}{4}.x\right)=100\)
\(\left(\frac{1}{4}.x\right)=8:100\)
\(\left(\frac{1}{4}.x\right)=\frac{2}{25}\)
\(x=\frac{2}{25}:\frac{1}{4}\)
\(x=\frac{8}{25}\)
\(d.3:\frac{9}{4}=\frac{3}{4}:\left(6.x\right)\)
\(\Rightarrow\frac{3}{4}:\left(6.x\right)=3:\frac{9}{4}\)
\(\frac{3}{4}:\left(6.x\right)=\frac{4}{3}\)
\(\left(6.x\right)=\frac{3}{4}:\frac{4}{3}\)
\(\left(6.x\right)=\frac{9}{16}\)
\(x=\frac{9}{16}:6\)
\(x=\frac{3}{32}\)
^...^ ^_^
tìm x trong tỉ lệ thức sau :
\(4,5:0,3=2,25:\left(0,1.x\right)\)
!!! giúp...giúp mình wới mọi người ơi !!!
4,5 : 0,3 = 2,25 : (0,1.x)
15 = 2,25 : (0,1.x)
15 : 2,25 = 0,1.x
20/3 = 0,1.x
20/3 : 0,1 = x
200/3 = x
Ta có: 4,5 : 0,3 = 2,25 : (0,1 . x)
=> 4,5 . (0,1. x) = 2,25 . 0,3
=> 0,45 . x = 0,675
=> x = 0,675 : 0,45
=> x = 1,5
Vậy x = 1,5
Tìm x trong các tỉ lệ thức sau:
a) \(\left(\frac{1}{3}.x\right):\frac{2}{3}=1\frac{3}{4}:\frac{2}{5}\)
b) 4,5 : 0,3 = 2,25 : (0,1 .x)
c) 8 : \(\left(\frac{1}{4}.x\right)=2:0,02\)
d) 3 : \(2\frac{1}{4}=\frac{3}{4}:\left(6.x\right)\)
\(\frac{1}{3}x:\frac{2}{3}=1\frac{3}{4}:\frac{2}{5}\)
\(\Rightarrow\frac{1}{3}x:\frac{2}{3}=\frac{35}{8}\)
\(\Rightarrow\frac{1}{3}x=\frac{35}{12}\)
\(\Rightarrow x=\frac{35}{4}\)
a) \(\left(\frac{1}{3}\cdot x\right):\frac{2}{3}=1\frac{3}{4}:\frac{2}{5}\)
\(=\left(\frac{1}{3}\cdot x\right):\frac{2}{3}=\frac{35}{8}\)
\(\Rightarrow\frac{1}{3}\cdot x=\frac{35}{8}\cdot\frac{2}{3}\)
\(\Rightarrow x=\frac{35}{12}:\frac{1}{3}=\frac{35}{4}\)
b) \(4,5:0,3=2,5:\left(0,1\cdot x\right)\)
\(=15=2,5:\left(0,1\cdot x\right)\)
\(\Rightarrow0,1\cdot x=2,25:15\)
\(\Rightarrow x=\frac{3}{20}:0,1=\frac{3}{2}=1,5\)
c) \(8:\left(\frac{1}{4}\cdot x\right)=2:0,02\)
\(8:\left(\frac{1}{4}\cdot x\right)=100\)
\(\Rightarrow\frac{1}{4}\cdot x=8:100\)
\(\Rightarrow x=\frac{2}{25}:\frac{1}{4}=\frac{8}{25}=0,32\)
d) \(3:2\frac{1}{4}=\frac{3}{4}:\left(6\cdot x\right)\)
\(=\frac{4}{3}=\frac{3}{4}:\left(6:x\right)\)
\(\Rightarrow6\cdot x=\frac{3}{4}:\frac{4}{3}\)
\(\Rightarrow x=\frac{9}{16}:6=\frac{3}{32}=0,09375\)
Tìm x trong các tỉ lệ thức sau:
a) \(\left(\frac{1}{3}.x\right):\frac{2}{3}=1\frac{3}{4}:\frac{2}{5}\)
b) 4,5 : 0,3 = 2,25 : ( 0,1 .x)
c) \(8:\left(\frac{1}{4}.x\right)=2 :0,02\)
d) \(3:2\frac{1}{4}=\frac{3}{4}:\left(6.x\right)\)
Tìm \(x\) trong các tỉ lệ thức sau :
a) \(\left(\dfrac{1}{3}.x\right):\dfrac{2}{3}=1\dfrac{3}{4}:\dfrac{2}{5}\)
b) \(4,5:0,3=2,25:\left(0,1.x\right)\)
c) \(8:\left(\dfrac{1}{4}.x\right)=2:0,02\)
d) \(3:2\dfrac{1}{4}=\dfrac{3}{4}:\left(6.x\right)\)
a)
b) 4,5 : 0,3 = 2,25 : ( 0,1.x) => 0,1.x =
c)
d)
Bạn hãy chỉ giúp mình cách viết phân số và hỗn số trên máy tính. Mình cảm ơn bạn nhiều lắm!^ - ^
Tìm x trong tỉ lệ 4,5 : 0,3 =2.25 : (0,1 . x)
4,5 : 0,3 =2.25 : (0,1 . x)
15=50:(0,1.x)
=>0,1.x=50:15
0,1.x=10/3
x=10/3:0,1
x=100/3
1. tìm x trong các tỉ lệ thức sau:
a. \(\left(\frac{1}{3}.x\right):\frac{2}{3}=1\frac{3}{4}:2\)
b. 4,5:0,3 = 2,25:(0,1.x)
c. 8:\(\left(\frac{1}{4}.x\right)=2:0,02\)
c. \(3:2\frac{1}{4}=\frac{3}{4}:\left(6:x\right)\)
2. tìm hai số x,y,z biết rằng
\(\frac{x}{2}=\frac{y}{3},\frac{y}{4}=\frac{z}{5}\) và x+y-z=10
tìm x: 4,5:0,3=2,25:(0,1.x)
4,5 : 0,3 = 2,25 : (0,1.x)
15 = 2,25 : (0,1.x)
2,25 : 15 = 0,1.x
0,15 = 0,1.x
=> x = 0,15 : 0,1
x = 1,5
TL:
4,5 : 0,3 = 2,25 : (0,1.x)
15 = 2,25 : (0,1.x)
2,25 : 15 = 0,1.x
0,15 = 0,1.x
=> x = 0,15 : 0,1
x = 1,5
HT
tìm x
a , ( 1/3 .x) : 2/3 = 1/3/4 : 2/5
b , 4,5 : 0,3 = 2,25 : ( 0,1 .x)
c , 8 : ( 1/4 .x ) = 2: 0,02
d , 3 : 2/1/4 = 3/4 : ( 6 .x )
a.=> \(\frac{\left(\frac{1}{3}\right).x}{\frac{2}{3}}=\frac{\frac{7}{4}}{\frac{2}{5}}\)
=> \(\frac{1}{3}.x=\frac{7}{4}.\frac{2}{3}:\frac{2}{5}\)
=>\(\frac{1}{3}.x=\frac{35}{12}\)
=> x\(=\frac{35}{12}:\frac{1}{3}\)
Vậy x=\(\frac{35}{4}\).
b. => \(\frac{4,5}{0,3}=\frac{2,25}{0,1.x}\)
=>\(0,1.x=\frac{2,25.0,3}{4,5}\)
=>\(0,1.x=0,15\)
=>\(x=0,15:0,1\)
Vậy x=1,5
c. =>\(\frac{8}{\frac{1}{4}.x}=\frac{2}{0,02}\)
=>\(\frac{1}{4}.x=\frac{8.0,02}{2}\)
=>\(\frac{1}{4}.x=0,08\)
=>\(x=0,08:\frac{1}{4}\)
Vậy x=0,32.
d. =>\(\frac{3}{\frac{9}{4}}=\frac{\frac{3}{4}}{6.x}\)
=>\(3.6x=\frac{9}{4}.\frac{3}{4}\)
=>\(18x=\frac{27}{16}\)
=>\(x=\frac{27}{16}:18\)
Vậy x=\(\frac{3}{32}\)