Question

Use elimination to solve each system below.

System 1
7x + 2y = 11
x + 2y = -7
Enter the values of x and y in the solution for each system in the
following table.
value of x
System 1
System 2
7x + 2y = 11
-x + y = 1
System 2
value of y

Answer 1

x = 3, y = -5

Explanation:

Subtracting the equations yields 6x = 18, and thus x = 3.

Substituting this back into the first equation gives 7(3)+2y=11, and thus y = -5.