Question

{a+b=100
{a-b=8
gente preciso disso pra hj

Answer 1

{a+b=100
{a-b=8

2a= 108
a= 108/2
a= 54

54 + b = 100
b = 100 - 54
b = 46

54 + 46 = 100
54 - 46 = 8