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Solve x-3t=6 and 4x+3t=9

  • Mathematics -

    well, we know that x = 3t+6, so use it:

    4(3t+6)+3t = 9
    12t+24+3t = 9
    15t = -15
    t = -1
    so, x = 3t+6 = 3

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