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30 December, 03:20

Tyson began solving the system {4x+2y=64x+5y=15 by writing - 3y=-9.

Which property justifies this step?

division property of equality

multiplication property of equality

substitution property of equality

subtraction property of equality

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  1. 30 December, 03:51
    0
    4x+2y=6 (1)

    4x+5y=15 (2)

    1) - (2) = 4x-x4 + 2y - 5y = 6 - 15

    equivalent to - 3y = - 9

    so the true answer is subtraction property of equality
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