Răspuns :
a - b = 280
a :b = 8 => a = 8 × b
8×b - b = 280
7×b = 280 =>b= 280 : 7 =>
b= 40
a = 40 × 8 =>a = 320
a :b = 8 => a = 8 × b
8×b - b = 280
7×b = 280 =>b= 280 : 7 =>
b= 40
a = 40 × 8 =>a = 320