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    mariarosamaripo's Avatar
    mariarosamaripo Posts: 3, Reputation: 1
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    #1

    Jan 6, 2009, 09:48 PM
    how to solve substitution
    2x-3=-y
    3x+5y=2
    ISneezeFunny's Avatar
    ISneezeFunny Posts: 4,175, Reputation: 821
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    #2

    Jan 6, 2009, 10:01 PM

    2x - 3 = -y

    multiply the entire thing by (-1)

    y = 3 - 2x

    substitute into second equation

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

    3x + 15 - 10x = 2

    you can solve the rest.
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