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intermediate algebra

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Solve using the elimination method. Show your work. If the system has no solution or an infinite number of solutions,state this.
3x+7y=77

-2x+7y=42

  • intermediate algebra -

    Subtract equation #2 from equation # 1.

    5x = 35

    You should be able to take it from here.

  • intermediate algebra -

    I understand where I should what from where plz help me out. It would really be appreciaeted.

  • intermediate algebra -

    3x-(-2x) = 3x+2x = 5x

    7y-7y = 0

    77-42 = 35

    Therefore 5x + 0 = 35 or 5x = 35

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