Question

calcule x para que haja proporcionalidade:
a) 4/6=x/15=
b) x/20=1/4=
c) 7/x=2/1=
d) 3/9=x/27
e) 12x/54=4/9=

Answer 1

a) 4/6 = x/15
6x = 60
x =10

b) x/20= 1/4
4x=20
x=5

c) 7/x= 2/1
2x=7
x = 7/2

d) 3/9 = x/27
9x=81
x=9

e) 12x/54 = 4/9
108x=216
x=2