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27 March, 23:35

Solve each system by elemination, 4x+8y=20 and - 4x+2y=-30

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  1. 28 March, 00:05
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    The sum of the left side of these two equations is equal to the same of the right side is these two equations

    4x+8y + (-4x+2y) = 20 + 30

    10y = 50 (x is eliminated)

    y=5

    Take this into the second equation

    -4x + 2y = 30

    -4x + 2*5 = 30

    x=-5

    So x=-5

    y=5
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