Answer:
Two solutions
x = -3
y = 2
Step-by-step explanation:
The values of x and y are the solutions of the system.
From (1)
x = -9 + 3y
Substitute this in (2)
4(-9 + 3y) + 15y = 18
-36 + 12y + 15y = 18
-36 + 27y = 18
27y = 54
y = 2
and x = -9 + 3(2)
x = -9 + 6
x = -3
