Răspuns:
1. [tex]2*a + 9 = 16 (=)2*a = 16 - 9(=)2*a=7=) a = 7/2=3,5[/tex]
2. 60% din 32 = 60*100/32= 0,6 * 32 = 19,2
3. a+b+c=78, cu a > b > c =) 78/3=26 =) b=26, a= 26+1= 27, c= 26-1=25
