Question

Calcule e se possível, simplifique o resultado

10/15=2/?

7/28=?/4

12/?=3/6

?/5=4/10

Answer 1

10/15=2/x
10x=30
x=30/10
x=3

7/28=x/4
28=28x
x=28/28
x=1

12/x=3/6
72=3x
x=72/3
x=24

x/5=4/10
10x=20
x=20/10
x=2

Answer 2

10/15 = 2/3

10÷5= 2

15÷5= 3

7/28 = 1/4

7÷7= 1

28÷7= 4

12/24 = 3/6

12÷4= 3

24÷4= 6

2/5 = 4/10 = 2/5

2×4= 4

5×2= 10

simplificando:

4÷2= 2

10÷2= 5