Ответ: 130
Пошаговое объяснение:
(3/5)*a + (3/5)*b = 42+36=78
(3/5)(a + b) = 78
a + b = 78/(3/5) = 78*5/3 = 130
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Ответ: 130
Пошаговое объяснение:
(3/5)*a + (3/5)*b = 42+36=78
(3/5)(a + b) = 78
a + b = 78/(3/5) = 78*5/3 = 130