Răspuns :
a*b=126.........=> b=126:a
(a+5)*b=161...=>.b=(161-126):5
b=35:5
b=7
a*7=126...=> a=126:7
a=18
(18+5)*7=
=23*7
=161
(a+5)*b=161...=>.b=(161-126):5
b=35:5
b=7
a*7=126...=> a=126:7
a=18
(18+5)*7=
=23*7
=161
Notam cu a si b numerele
a×b=126
(a+5)×b =161
a×b+ 5×b=161
126 + 5×b=161
5×b=161 - 126
5×b= 35
b= 35 :5
b=7
a=126:7=18
Verific: 18 x 7= 126 (produsul numerelor)
a×b=126
(a+5)×b =161
a×b+ 5×b=161
126 + 5×b=161
5×b=161 - 126
5×b= 35
b= 35 :5
b=7
a=126:7=18
Verific: 18 x 7= 126 (produsul numerelor)