Question

Ma ajutați va rog :)
a) 4 supra x =9 supra 5
b) 11 supra 5 = x supra10
c) 4 supra 13 = 1 supra x
d) x supra 3= 5 supra 1
e) 0,(3)supra x = 2 supra 0,(2)
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Answer 1

4/x=9/5⇒x=20/9
11/5=x/10⇒x=40/13
4/13=1/x⇒13/4
x/3=5/1⇒x=15
0.(3)/x=2/0.(2)⇒x=0.(074)/2
Sper ca am fost de folos!!!

Answer 2

a) 4 /x =9/ 5  
x=4×5/9=20/9=2,(2)
b) 11/ 5 = x/10 
x=10 ×11/5=22
c) 4/13 = 1/x
x=13/4=3,25
d) x/3= 5/1 
x=15
e) 0,(3)/ x = 2/ 0,(2)
(1/3)/x=2/(2/9)
1/3x=9
x=0,0(37)