How do you solve 4x - 8y = 30 and 6x - 12y = -64?

Jul 30, 2016

There is no solution.

Explanation:

First simplify each of the equations.

$4 x - 8 y = 30 \text{ " and " } 6 x - 12 y = - 64$

$2 x - 4 y = 15 \text{ A }$
$x - 2 y = - 16 \text{ B}$

Notice what happens if we multiply B by 2:

$2 x - 4 y = - 32 \text{ B}$

In A $\text{ } 2 x - 4 y = 15$