Упростите выражение и найдите его значение
8,7b-5,3b d=2
4,4c+5,8c c=3
1/2a+1/3a+1/6a a=12
9,7b-5,8b+4,1b b=1,5
2,9c+6,3c-4,2c c=1,2

▪8,7b-5,3b = 3,4b = 3,4 × 2 = 6,8▪4,4c+5,8c = 10,2c = 10,2 × 3 = 30,6▪1/2a+1/3a+1/6a = (3/6)a + (2/6)a + (1/6)a = (6/6)a = a = 12▪9,7b-5,8b+4,1b = 8b = 8 × 1,5 = 12▪2,9c+6,3c-4,2c = 5c = 5 × 1,2 = 6