Algebra 1

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

  • Algebra 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).

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