Вопрос школьника по предмету Математика
Сумма двух чисел равна 27. Сумма 60% одного из чисел и 5/6 части второго равна 19. Найдите эти числа.
Ответ учителя по предмету Математика
Первое число Х
Второе число ( 27 — Х )
0,6х + 5/6( 27 — Х ) = 19
0,6х + ( 135/6 ) — ( 5/6 )Х = 19
3/5х — 5/6х = 19 — 22,5
18/30х — 25/30х = — 3,5
— 7/30х = — 7/2
Х = 7/2 : 7/30
Х = 15 ( первое число )
27 — 15 = 12 ( второе число )
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