Răspuns :
a+b=35
a-b=7
a=b+7
b+7+b=35
2b+7=35
2b=35-7
2b=28
b=28:2
b=14
a=14+7
a=21
a*b=14*21
a*b=294
a-b=7
a=b+7
b+7+b=35
2b+7=35
2b=35-7
2b=28
b=28:2
b=14
a=14+7
a=21
a*b=14*21
a*b=294