Răspuns:
c) x : 12 = 24
x = 24 * 12
x = 288
d) 144 : x = 6
x = 144 : 6
x = 24
e) 100 - (5 + x : 2) : 10 - 35 = 65
100 - (5 + x : 2) : 10 = 65 + 35
100 - (5 + x : 2) : 10 = 100
(5 + x : 2) : 10 = 100 - 100
(5 + x : 2) : 10 = 0
5 + x : 2 = 0 * 10
5 + x : 2 = 0
x : 2 = 5 - 0
x : 2 = 5
x = 5 * 2
x = 10