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(a:3-5)x9+186:6=400:10

Răspuns :

Salut.

(a ÷ 3 - 5) × 9 + 186 ÷ 6 = 400 ÷ 10

(a ÷ 3 - 5) × 9 + 31 = 40

(a ÷ 3 - 5) × 9 = 40 - 31

(a ÷ 3 - 5) × 9 = 9

a ÷ 3 - 5 = 9 ÷ 9

a ÷ 3 - 5 = 1

a ÷ 3 = 1 + 5

a ÷ 3 = 6

a = 6 × 3

a = 18

- Lumberjack25