# How do you solve x-2y=-25 and 3x-y=0?

Jul 19, 2018

$x = 5$ and $y = 15$

#### Explanation:

As $3 x - y = 0$, we have $y = 3 x$

hence $x - 2 y = - 25$ becomes

$x - 2 \cdot 3 x = - 25$

or $x - 6 x = - 25$

or $- 5 x = - 25$

i.e. $x = \frac{- 25}{- 5} = \frac{25}{5} = 5$

and $y = 3 \cdot 5 = 15$