Respuesta:
X+4y=21
X-2y=6
2 (X - 2y = 6) → 2X-4y=12
________
3x = 33
x = 11
(11) + 4y = 21
4y = 21 - 11
4y = 10
y = 10 / 4
y = 2,5
Comprobación:
(11) + 4(2,5) = 21
11 + 10 = 21
(11) - 2(2,5) = 6
11 - 5 = 6
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Respuesta:
X+4y=21
X-2y=6
X+4y=21
2 (X - 2y = 6) → 2X-4y=12
________
3x = 33
x = 11
X+4y=21
(11) + 4y = 21
4y = 21 - 11
4y = 10
y = 10 / 4
y = 2,5
Comprobación:
X+4y=21
(11) + 4(2,5) = 21
11 + 10 = 21
X-2y=6
(11) - 2(2,5) = 6
11 - 5 = 6