Question

Resolva as proporções de forma direta.

$ex: \frac{x}{14} = \frac{3}{7} \: mutiplica - se \: \: \frac{x}{14} = \frac{3}{7} \: \: 7x = 14.3 \: \: \: 7x = \: 42x = \frac{42}{7} x \: = 6$

$a) \: \frac{x}{20} = \frac{18}{12}$

$b) \: \frac{15}{x} = \frac{3}{8}$

$c) \: \frac{16}{3} = \frac{2x}{9}$

$d) \: \frac{x + 5}{6} = \frac{7}{3}$
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Answer 1

A) 12x = 18 x 20
12x = 360
X = 360
12
X = 30

B) 3x = 15 x 8
3x = 120
X = 120
3
X = 40

C) 3.2+x = 6x
6x = 16 x 9
6x = 144
X = 144
6
X = 24

D) 3.x+5 = 8x
8x = 7x6
8x = 42
X = 42
8
X = 5,25