Răspuns :
a*b = 2540
a (b-100) = 1540
a*b - 100a = 1540
2540 - 100a = 1540
100a = 1000 => a = 10
b = 254
a (b-100) = 1540
a*b - 100a = 1540
2540 - 100a = 1540
100a = 1000 => a = 10
b = 254
a×b=2540
a×(b-100)=1540
a×b-100a=1540
2540-100a=1540
100a=2540-1540
100a=1000
a=1000:100 => a=10
10×b=2540
b=2540:10 => b=254
a×(b-100)=1540
a×b-100a=1540
2540-100a=1540
100a=2540-1540
100a=1000
a=1000:100 => a=10
10×b=2540
b=2540:10 => b=254