Question

Resolva x+y=15 X-y =5

Answer 1

x+y= 15 --> x=15-y

x-y= 5 -> 15-y-y= 5
-2y= -15+5
y= -10/-2
y= 5

x=15-5
x=10

Answer 2

Resposta:

Explicação passo-a-passo:

X+y=15 x-y=5