Question

dos numeros que sumados den 89 y restados 27

Answer 1

a+b=89
a-b=27
2a=116
a=58
b=29

Answer 2

a+b=89
a-b=27
b+27=a
b+27+b=89
2b+27=89
2b=89-27
2b=62
b=62/2
b=31
31+a=89
a=89-31
a=58