tìm x trong các tỉ lệ thữ sau:a) \(\left(\frac{1}{3}\times x\right)\) : \(\frac{2}{3}=1\frac{3}{4}\) : \(\frac{2}{5}\)b) 4,5 : 0,3 = 2,25 : ( 0,1 . x )c) 8 : \(\left(\frac{1}{4}\times x\right)\) = 2 : 0,02d) 3 : \(2\frac{1}{4}\) = \(\frac{3}{4}\) : ( 6 . x...
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tìm x trong các tỉ lệ thữ sau:
a) \(\left(\frac{1}{3}\times x\right)\) : \(\frac{2}{3}=1\frac{3}{4}\) : \(\frac{2}{5}\)
b) 4,5 : 0,3 = 2,25 : ( 0,1 . x )
c) 8 : \(\left(\frac{1}{4}\times x\right)\) = 2 : 0,02
d) 3 : \(2\frac{1}{4}\) = \(\frac{3}{4}\) : ( 6 . x )
a. => (1/3.x):2/3=7/4:2/5
=> 1/3.x=(7/4.2/3):2/5
=> 1/3.x=7/6.5/2
=> 1/3.x=35/12
=> x=35/12:1/3
=> x=35/12.3
=> x=35/4
b. => 4,5.(0,1.x)=0,3.2,25
=> 4,5.(0,1.x)=0,675
=> 0,1.x=0,675:4,5
=> 0,1.x=0,15
=> x=0,15:0,1
=> x=1,5
c. => 2.(1/4.x)=8.0,02
=> 1/2.x=0,16
=> x=0,16:1/2
=> x=0,16.2
=> x=0,32
d. => 3:9/4=3/4:(6.x)
=> 3.(6.x)=9/4.3/4
=> 18.x=27/16
=> x=27/16:18
=> x=27/16.1/18
=> x=3/32
a) ( 1/3 . x ) : 2/3 = 7/4 : 2/5
1/3 . x : 2/3 = 35/8
1/3 . x = 35/8 . 2/3
1/3 . x = 35/12
x = 35/12 : 1/3
x = 35/4