Question

2) descubra o numero inteiro que deve substituir a letra "x"

a)x.(-6)=-12
b)x.(-10)=+50
c)x.(-8)=-72
d)(-7).x=+28
e)(+12).x=-48
f)(-4).x=-16
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Answer 1

Resposta:

a)x.(-6)=-12

$- 6x = - 12 \times ( - 1) \\ 6x = 12 \\ x = \frac{12}{6} \\ \\ x = 2$

b)x.(-10)=+50

$- 10x = 50 \times ( - 1) \\ 10x = - 50 \\ x = - \frac{50}{10} \\ x = - 5$

c)x.(-8)=-72

$- 8x = - 72 \times ( - 1) \\ 8x = 72 \\ x = \frac{72}{8} \\ \\ x =9$

d)(-7).x=+28

$- 7x = 28 \times ( - 1) \\ 7x = - 28 \\ x = - \frac{28}{7} \\ x = - 4$

e)(+12).x=-48

$12x = - 48 \\ x = - \frac{48}{12} \\ \\ x = - 4$

f)(-4).x=-16

$- 4x = - 16 \times ( - 1) \\ 4x = 16 \\ x = \frac{16}{4} \\ x = 4$

Answer 2

Explicação passo-a-passo:

A)6x = -12

x = -12/6

x = -2

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B) - 10x = 50

- x = 50/10

x = - 5

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C) 9x = 27

x = 27/9

x = 3

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D) -4x = 16

- x = 16/4

x = -4