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26 August, 06:43

X e 5 7 10 12

Y 10 13 19 f 34

f = 28, e = 4

e = 28, f = 4

f = 30, e = 2

e = 30, f = 2

+3
Answers (1)
  1. 26 August, 07:31
    0
    5 → 13

    3 · 5 - 2 = 15 - 2 = 13

    7 → 19

    3 · 7 - 2 = 21 - 2 = 19

    12 → 34

    3 · 12 - 2 = 36 - 2 = 34

    Therefore we have the equations

    3e - 2 = 10 |add 2 to both sides

    3e = 12 |divide both sides by 3

    e = 4

    3 · 10 - 2 = f

    f = 30 - 2

    f = 28

    Answer: f = 28, e = 4
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