Question

9x-2y=-3
7y-12x=17

Método de reducción

Answer 1

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$\left \{{{9x - 2y = - 3} \atop{7y - 12x = 17}} \right.$

$\left \{{{x = - \frac{1}{3} + \frac{2}{9} y} \atop{7 y - 12x = 17}} \right.$

$7y - 12( - \frac{1}{3} + \frac{2}{9} y) = 17$

$y = 3$

$x = - \frac{1}{3} + \frac{2}{9} \times 3$

$x = \frac{1}{3}$

$\boxed{(x,y) = ( \: \frac{1}{3} , \: 3 )}$

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