• Choice A

    Solve the system of equations:

    x+2y=8(1)x + 2y = 8 \quad \text{(1)} 2x+y=14(2)-2x + y = 14 \quad \text{(2)}

    From equation (2), solve for yy:

    y=14+2xy = 14 + 2x

    Substitute into equation (1):

    x+2(14+2x)=8x + 2(14 + 2x) = 8

    x+28+4x=8x + 28 + 4x = 8

    5x=205x = -20

    x=4x = -4

    Substitute back to find yy:

    y=14+2(4)=148=6y = 14 + 2(-4) = 14 - 8 = 6

    The solution is (4,6)(-4, 6).

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