Resposta :
x+y = 58
x-y = 12
---------------
2x = 70
x = 70/2
x = 35
x+y = 58
y = 58-x
y = 58-35
y = 23
x-y = 12
---------------
2x = 70
x = 70/2
x = 35
x+y = 58
y = 58-x
y = 58-35
y = 23
X+y = 58
x-y = 12
---------------
2x = 70
x = 70/2
x = 35
x+y = 58
y = 58-x
y = 58-35
y = 23
eu acho que e isso
x-y = 12
---------------
2x = 70
x = 70/2
x = 35
x+y = 58
y = 58-x
y = 58-35
y = 23
eu acho que e isso