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14 March, 16:08

Solve the system:

10r-4t=6

7r + 5t=12

+2
Answers (1)
  1. 14 March, 16:31
    0
    t=1

    r=1

    Step-by-step explanation:

    10r-4t=6 equation 1

    7r + 5t=12 equation 2

    using equation 1 we have:

    10r-4t=6

    10r = 6+4t

    r = (6+4t) / 10 equation 3

    using equation 3 in equation 2 we have:

    7 ((6+4t) / 10)) + 5t=12

    4.2 + 2.8t + 5t = 12

    7.8t = 12-4.2

    7.8t = 7.8

    t = 7.8/7.8

    t=1

    so we have:

    r = (6+4 (1)) / 10

    r = 10/10

    r=1
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