1.
a+b = 179
a:b = 4 rest 9 => a = 4b+9
4b+9+b = 179
5b = 170
b = 170:5 = 34
a = 145
2.
36+39+75 = 150 (jucarii ramase in magazine)
354-150 = 204 (jucarii vandute in total)
204:3 = 68 (jucarii vandute la fiecare magazin)
I magazin : 68+36 = 104
II magazin : 68+39 = 107
III magazin : 68+75 = 143
3.
a-b = 81
a:b = 4 rest 6 => a = 4b+6
4b+6-b = 81
3b = 75
b = 75:3 = 25
a = 106
