QUESTION IMAGE
Question
- $-4x + y = 6$
$-5x - y = 21$
Step1: Sumar las dos ecuaciones
$$(-4x + y) + (-5x - y) = 6 + 21$$
$$-9x = 27$$
Step2: Resolver para $x$
$$x = \frac{27}{-9} = -3$$
Step3: Sustituir $x=-3$ en la primera ecuación
$$-4(-3) + y = 6$$
$$12 + y = 6$$
Step4: Resolver para $y$
$$y = 6 - 12 = -6$$
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$x=-3$, $y=-6$