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31 May, 02:39

3a + 2b = 13

3a + 6b = 33

A=?

B=?

+3
Answers (1)
  1. 31 May, 02:43
    0
    3a + 2b = 13 ⇒ - 1 (3a + 2b = 13) ⇒ - 3a - 2b = - 13

    3a + 6b = 33 ⇒ 1 (3a + 6b = 33) ⇒ 3a + 6b = 33

    4b = 20

    b = 5

    3a + 2b = 13

    3a + 2 (5) = 13

    3a + 10 = 13

    3a = 3

    a = 1

    Answer: a = 1, b = 5
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