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How do you solve $x + y = 5$ $x+y=5$ and $3 x - y = 3$ $3x-y=3$ ?

1 Answer

Mar 5, 2018

$y = 3$ $y=3$
$x = 2$ $x=2$

Explanation:

$x + y = 5$ $x+y=5$
$3 x - y = 3$ $3x-y=3$

$y = 5 - x$ $y=5-x$
$3 x - (5 - x) = 3$ $3x-(5-x)=3$

$y = 5 - x$ $y=5-x$
$3 x - 5 + x = 3$ $3x-5+x=3$

$y = 5 - x$ $y=5-x$
$4 x = 8$ $4x=8$

$y = 3$ $y=3$
$x = 2$ $x=2$

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