Question

No sistema linear
x+ 2y= -3
2x-y= 4
o valor de x+y será igual a
a) 0
b) 1
c) -1
d)-2
e)2

Answer 1

x+ 2y= -3
2x-y= 4(2)

x+ 2y= -3
4x-2y= 8
    5x = 5 ==> x = 1
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2x - y =