Question

1) Calcule o valor de 2 nas proporções:

a) x/3 = 6/10

b) 3/7 = 60/x

c) 6/x = 14/5

d) 7/6 = 42/x

e) 35/25 = 30/20

f) 22/15 = 6/9

Answer 1

a) x =  6  ==> 10x = 18 ==> x = 18/10
    3    10
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b) 3 = 60 ==> 3x = 420 ==> x = 140
    7     x
============================================
c) 6  = 14 ==> 14x = 30 ==. x = 30/14
    x       5
===============================================
d) 7 = 42 ==> 7x = 252 ==> x = 36
    6     x
================================================
e) 35  = 30 ==> 35.20 = 25.30 ==> 700 = 750  F
    25     20
=================================================
f) 22 = 6 ==> 198 = 90  F
   15    9