Question

(ПОМОГИТЕ ПОЖАЛУЙСТА
$(20 - x) - 6\frac{7}{18 } =3 \frac{17}{18}$
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Answer 1

Ответ:

(а) 18 × [7 + (–3)] = [18 × 7] + [18 × (–3)]

18 × [4] = [18 × 7] + [–54]

18 × [4] = 126 –54

72 = 72

LHS = RHS

(б) (–21) × [( - 4) + ( - 6)] = [(–21) × ( - 4)] + [(–21) × ( - 6)]

(–21) × (-10) = 84 +126

210 = 210

LHS = RHS