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14 May, 02:08

If 5c-2b=15 and 3b-4c=12, what is the value of b+c?

(a) - 27

(b) - 3

(c) 8

(d) 27

(e) cannot be determined with the information given

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Answers (1)
  1. 14 May, 02:36
    0
    D).

    using linear combinations you can add the 2 rows and it will get you b+c=27.

    -2b+5c=15

    3b-4c=12

    b+c=27
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