math problem

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very confused could someone help me with this

using the elimination method

5r-3s=16
3r+5s=30

  • math problem -

    Let's say we want to eliminate 's'
    So multiply 5 to the first equation
    and multiply 3 to the second equation
    we get:
    25r - 15s = 80
    9r + 15s = 90

    use the elimination method by adding those two equation -15s and 15s cancels out
    we get:
    34r = 170

    Then r = 5

  • math problem -

    2c+3d+7-5c

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