Solve the system of equations by the addition method Please

Solve the system of equations by the addition method. Please show the work.

- 5x - 5y = 0

3x + 2y = - 4

- 5x - 5y = 0

3x + 2y = - 4

multiply 1st equation with 2 and second with 5

- 10x - 10y = 0

15x + 10y = - 20

add the equation

5x = -20

x = -4

so 5y = -5x

y = -x

y = 4