Question

Calcule o valor de X nas proporções.

$\frac{3}{15} = \frac{x}{5} =$

$\frac{12}{3} = \frac{x}{5} =$

$\frac{x}{14} = \frac{2}{7} =$

$\frac{15}{60} = \frac{60}{x} =$
​

Answer 1

Explicação passo-a-passo:

a)15•x=3•5=15x=15 =x= 15 x=1

15

b)3•x=12•5

3x=60

x=60

3

x=20

c)x•7=14•2

7x=28

x=28

7

x=4

d)15•x=60•60

15x=3600

x=3600

15

x=240

espero ter ajudado

Answer 2

Explicação passo-a-passo:

A)

$\dfrac{3}{15} = \dfrac{x}{5}$

$15x = 3 \times 5$

$15x = 15$

$x = \dfrac{15}{15}$

x=>1

B)

$\dfrac{12}{3} = \dfrac{x}{5}$

$3x = 12 \times 5$

$3x = 60$

$x = \dfrac{60}{3}$

x=>20

C)

$\dfrac{x}{14} = \dfrac{2}{7}$

$7x = 2 \times 14$

$7x = 28$

$x = \dfrac{28}{7}$

x=>4

D)

$\dfrac{15}{60} = \dfrac{60}{x}$

$15x = 60 \times 60$

$15x = 3600$

$x = \dfrac{3600}{15}$

x=>240