Question

resolva os sistemas 10x+2y=-2
3x+4y=13

Answer 1

10x + 2y = -2 . (-2)
3x + 4y = 13


-20x - 4y = 4
3x + 4y = 13
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-17x = 17
x = 17/-17
x = -1
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3x + 4y = 13
3.(-1) + 4y = 13
-3 + 4y = 13
4y = 13 + 3
y = 16/4
y = 4


X= -1
Y= 4

s={ -1, 4 }