#### Answer

$(-6, 20)$

#### Work Step by Step

In order to solve this problem, we multiply one or both of the equations by a value that will make one of the variables cancel. We multiply the top equation by 9, and we multiply the bottom equation by -4. Then, we add the two equations to obtain:
$ \frac{9y}{5} +\frac{12y}{10} = 60 \\ 3y = 60 \\ y =20$
We plug in the given value into the top equation and solve for the other variable:
$2/3 x +1/5(20) = 0 \\ 2/3x = -4 \\ x =-6 $