Solve the following using the substitution method and find the value of x and y:
-4y = -4
-5x = 15

The correct answer is: -3, 1

In this method, the elimination of the variable can be performed by substituting the value of another variable in an equation. Hence, this method is called the elimination by substitution method.
 -4y = -4 and -5x = 15
Given:
-4y = -4  …  (1)
-5x = 15 …(2)
The equation (1) can be written as y = 1 and equation 2 can be written as x = -3
Hence, the solution for the system of linear equations is:
x = -3 and y= 1