Question

Решите уравнение
50у - 18у = 832. 2n+7n-12=69

Answer 1

1. 32y=832 y=832:32 y=26 2. 2n+7n-12=69 9n=81 n=81:9 n=9

Answer 2

50-18y=832 18y=832+50 18y=882 y=882:18 y=49 50-18×40=832 832=832 2n+7n-12=69 9n-12=69 9n=69+12 9n=81 n=81:9 n=9 2×9+7×9-12=69 69=69