Question

Determine o valor de x nas proporções:

a)2x/5 = 18/15

b) 3/4 = 5x/20

Answer 1

a)2 x/5 = 18/15
2 x . 15 = 5 . 18
30 x = 90
x = 90/30
x = 3

b)3/4 = 5 x/20
5 x . 4 = 3 . 20
20 x = 60
x = 60/20
x = 3