Question

ПОМОГИТЕ МАТЕМАТИКА СРАЗУ 20 БАЛОВ ПОСТАВЛЮ СРОЧНО

Answer 1

Пошаговое объяснение:

$x + 3 \frac{7}{12} = 6 \frac{3}{4} \\ 2x + 3 \times 12 + 7 = 3(6 \times 4 + 3) \\ 12x + 36 + 7 = 3(6 \times 4 + 3) \\ 12x + 43 = 3(6 \times 4 + 3) \\ 12x + 43 = 3(24 + 3) \\ 12x + 43 = 3 \times 27 \\ 12x + 43 = 81 \\ 12x = 81 - 43 \\ 12x = 38 \\ x = 38 \div 12 \\ x = \frac{19}{6} = 3 \frac{1}{6}$