Предмет: Математика, автор: 100vriyani102

14 – (x – 2) = 23
(38 + x) – 18 = 31
12 – (x – 3) =3
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Ответы

Автор ответа: Fedorleto
1

14 - (x - 2) = 23

14 - x + 2 = 23

14 - x = 21

- x = 21 - 14

- x = 7

x = - 7

(38 + x) - 18 = 31

38 + x - 18 = 31

38 + x = 31 + 18

x = 31 + 18 - 38

x = 11

12 - (x - 3) = 3

12 - x + 3 = 3

12 - x = 3 - 3

- x = 3 - 3 - 12

-x = - 12

x = 12

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