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4x+2y=9 [2] multiplicar (3)
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-12x + 20y = - 8
12x + 6y = 27
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26y = 19
y = 19 / 26
y = 0,73. respuesta
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reemplazar valor (y) ecuación 2
4x + 2y = 9
4x + 2 (0,73) = 9
4x + 1,46 = 9
4x = 9 - 1,46
4x = 7,54
x = 7,54 / 4
x = 1,88. respuesta
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