(sexta série) Calcule o valor de x nas proporçoes ::
a) x/5= 6/10
b) 3/7= 60/x
c) 6/x = 14/35
d) 7/6 = 42/x
e) 35/25 = 30/x
f) 2x/15=6/9
g) 2x/3=3/6
a) x/5= 6/10
b) 3/7= 60/x
c) 6/x = 14/35
d) 7/6 = 42/x
e) 35/25 = 30/x
f) 2x/15=6/9
g) 2x/3=3/6
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