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How do you solve for y in $2 x - y = 6$ $2x-y=6$ and $x + y = - 3$ $x+y=-3$ ?

1 Answer

Don't Memorise · Nghi N.

Apr 26, 2015

$2 x - y = 6$ $2x - y = 6$
$x + y = - 3$ $x + y = -3$

We can add the equations to eliminate $y$ $y$ on the left hand side

$3 x = 3$ $3x = 3$

$\to x = 1$ $-> x = 1$

$\to y = - 3 - x = - 3 - 1 = - 4$ $-> y = -3 - x = -3 - 1 = color(green)(-4$

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