Question

x/3=6/9;2/x=10/15;3/4=9/x;x/5=8/4;x/4=3/2;4/8=x/16;2/5=10/15 va rugam ajutați ne ,multumim

Answer 1

x/3=6/9
(simplifici 6/9 cu 3)
x/3=2/3
x=2

2/x=10/15
(simplifici 10/15 cu 5)
2/x=2/3
x=3

3/4=9/x
(amplifici 3/4 cu 3)
9/12=9/x
x=12

x/5=8/4
(amplifici x/5 cu 4 si 8/4 cu 5)
4x/20=40/20
4x=40
x=10

x/4=3/2
(amplifici 3/2 cu 2)
x/4=6/4
x=6

4/8=x/16
(amplifici 4/8 cu 2)
8/16=x/16
x=7

2/5=10/15
(aici nu ai nici o necunoscuta)

Answer 2

X/3=6/9= 2/3
x/3 = 2/3 ⇒3 x = 6 ⇒ x = 6 : 3 ⇒ x=2

2/x=10/15= 2/3
2/x = 2/3 ⇒ 2 x = 2×3 ⇒ x = 6 : 2 ⇒ x = 3
 
3/4=9/x  ⇒ 3 x = 9 × 4 ⇒ x = 36 : 3 ⇒ x= 12

x/5=8/4= 2  ⇒ x = 2 x 5 = 10

x/4=3/2 ⇒ 2 x = 12 ⇒ x = 12 : 2 = 6

4/8=x/16 
1/2 =  x/16 ⇒2 x = 16 ⇒ x = 16 : 2 = 8