Răspuns :
a*b=540
(a+5)*b=600 => ab+5b=540+5b=600 =>5b=60 b=12
12a=540=> a
(a+5)*b=600 => ab+5b=540+5b=600 =>5b=60 b=12
12a=540=> a
a*b=540 b=540/a
(a+5)*b=600
(a+5) *540/a=600
540a+2700=600a
60a=2700
a=45
b=540:45=12
(a+5)*b=600
(a+5) *540/a=600
540a+2700=600a
60a=2700
a=45
b=540:45=12