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29 April, 09:00

2x+5y=-21, - 2x+3y+-27

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  1. 29 April, 09:25
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    x=4.5 and y = - 6

    Step-by-step explanation:

    2x+5y = - 21

    -2x+3y = - 27

    add the two equations: 8y = - 48

    y=-48/8 = - 6

    sub for y in 2x+5y = - 21

    2x + 5 (-6) = -21, 2x-30 = - 21

    2x = - 21+30 = 9

    x = 9/2=4.5
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