Răspunsuri

2014-10-21T16:36:43+03:00
A) a + b + c = 18 + 57 = 75
b) a + 5b + 5c = a + 5(b +c) = 18 + 5 * 57 = 18 285 = 303
c) 3a + 2(b +c) = 3 * 18 + 2 * 57 = 54 + 114 = 168
d) a(b + c) + 7(b + c) = 18 * 57 + 7 * 57 = 1026 + 399 = 1425