Solve each system graphically. Be sure to check your solution.

Question

If a system has an infinite number of solutions, use set-builder notation to write the solution set.If a system has no solution, state this. I tried this and found no solution, is this right?

x + y = 9
x - y = 1

Answer 1

x + y = 9
x - y = 1
Sum: 2x + 0 = 10
X = 5

In Eq1, replace x with 5:
5 + y = 9
Y = 4

Solution set: (x,y) = (5,4).