What is the solution of the system? Use elimination.

Question

4x-y=23
7x+y=21

Answer 1

To solve this system of equations using elimination, add the two equations together to eliminate the y variable.

4x - y + 7x + y = 23 + 21
11x = 44
x = 4

Now substitute x = 4 back into one of the original equations to find the value of y:

7(4) + y = 21
28 + y = 21
y = -7

Therefore, the solution to the system of equations is x = 4 and y = -7.