Given the system of equations:

We will find the solution using a graph.
We will graph the equations using the points of intercept
Line (1): 2x-3y = -18
When x = 0, y = 6
when y = 0, x = -9
so, the line passes through the points (0, 6) and (-9, 0)
Line (2): 3x + y = -5
when x = 0, y = -5
when y = 0, x = -5/3
so, the line passes thriugh the points (0, -5) and (-5/3, 0)