Răspuns :
a + b = 175
a = b/6
b/6 + b = 175 |×6
b + 6×b = 1050
7×b = 1050
b = 1050 : 7
b = 150
a = 175 - 150 = 25
a = b/6
b/6 + b = 175 |×6
b + 6×b = 1050
7×b = 1050
b = 1050 : 7
b = 150
a = 175 - 150 = 25