Question

Preciso de ajuda nesse atividade​

Answer 1

a) x + 5 = 13

x = 13 - 5

x = 8

b) x + 8 = - 15

x = - 15 - 8

x = - 23

c) x - 7 = 9

x = 9 + 7

x = 16

d) x - 16 = - 3

x = - 3 + 16

x = 13

e) x + 12 = - 15

x = - 15 - 12

x = - 27

f) x - 9 = 21

x = 21 + 9

x = 30

g) 2x = 8

x = 8

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2

x = 4

h) 3x = - 15

x = - 15

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3

x = - 5

i) - 4x = - 16 . (-1)

4x = 16

x = 16

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4

x = 4

j) x - 17 = 6

x = 6 + 17

x = 23

Answer 2

$a) \: x + 5 = 13 \\ x = 13 - 5 \\ x = 8$

$b) \: x + 8 = - 15 \\ x = - 15 - 8 \\ x = - 23$

$c) \: x - 7 = 9 \\ x = 9 + 7 \\ x = 16$

$d) \: x - 16 = - 3 \\ x = - 3 + 16 \\ x = 13$

$e) \: x + 12 = - 15 \\ x = - 15 - 12 \\ x = - 27$

$f) \: x - 9 = 21 \\ x = 21 + 9 \\ x = 30$

$g) 2x = 8 \\ x = \frac{8}{2} \\ x = 4$

$h) \: 3x = - 15 \\ 3x = \frac{ - 15}{3} \\ x = - 5$

$i) \: - 4x = - 16 \\ - 4x = \frac{ - 16}{ - 4} .( - 1) \\ x = 4$

$j) \: x - 17 = 6 \\ x = 6 + 17 \\ x = 23$

Bons estudos!