Question

25-{27:[(a-27:3):3]+42:7×3}=4​

Answer 1

Salut.

25 - {27 ÷ [(a - 27 ÷ 3) ÷ 3] + 42 ÷ 7 × 3} = 4

27 ÷ [(a - 27 ÷ 3) ÷ 3] + 42 ÷ 7 × 3 = 25 - 4

27 ÷ [(a - 27 ÷ 3) ÷ 3] + 42 ÷ 7 × 3 = 21

27 ÷ [(a - 9) ÷ 3] + 6 × 3 = 21

27 ÷ [(a - 9) ÷ 3] + 18 = 21

27 ÷ [(a - 9) ÷ 3] = 21 - 18

27 ÷ [(a - 9) ÷ 3] = 3

(a - 9) ÷ 3 = 27 ÷ 3

(a - 9) ÷ 3 = 9

a - 9 = 9 × 3

a - 9 = 27

a = 27 + 9

$\boxed{a=36}$

- Lumberjack25

Answer 2

Răspuns:

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