Question

Calcule o valor de x nas proporções:
A) 5/3 = X/10
B) 15/4 = 30/X

Answer 1

Resposta:

A) 15x = 30 × 4

15x = 120

x = 8

B) 5x = 3 × 10

5x = 30

x = 6

C) 3x = 9 × 1

3x = 9

x = 3

D) 5x = 1 × 15

5x = 15

x = 3

E) x = 3 × 9

x = 27

F) y = 15 × 2

y = 30

G) 3y = 5 × 6

3y = 30

y = 10

H) 7a = 14 × 8

7a = 112

a = 16

Answer 2

Resposta:

Solução:

A)

$\large \sf \displaystyle \left\begin{array}{l l l l l } \sf \dfrac{5}{3} = \dfrac{x}{10} \end{array}\right$

$\large \sf \displaystyle \left\begin{array}{l l l l l } \sf 3x = 5 \cdot 10 \end{array}\right$

$\large \sf \displaystyle \left\begin{array}{l l l l l } \sf 3x = 50 \end{array}\right$

$\large \sf \displaystyle \left\begin{array}{l l l l l } \sf x = \dfrac{50}{3} \end{array}\right$

B)

$\large \sf \displaystyle \left\begin{array}{l l l l l } \sf \dfrac{15}{4} = \dfrac{30}{x} \end{array}\right$

$\large \sf \displaystyle \left\begin{array}{l l l l l } \sf 15 x = 4 \cdot 30 \end{array}\right$

$\large \sf \displaystyle \left\begin{array}{l l l l l } \sf x = \dfrac{120}{15} \end{array}\right$

$\large \sf \displaystyle \left\begin{array}{l l l l l } \sf x = 8 \end{array}\right$

Explicação passo-a-passo:

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