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22 April, 13:29

What is the solution to the system x-y=-5 and 7x+3y=-75

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  1. 22 April, 15:20
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    x=-6

    y=-11

    Step-by-step explanation:

    x-y=-5

    7x+3y=-75

    x=5+y plug that in to the second equation

    7 (5+y) + 3y=-75

    35+7y+3y=-75

    10y=-75-35

    10y=-110

    y=-11

    plug y into first equation

    x+11=5

    x=5-11

    x=-6
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