If p + q + r = 4 and -p + q + r = 2, then p=? (A) -2 (B) -1 (C) 0 (D) 1 (E) 2

Question

If p + q + r = 4 and -p + q + r = 2, then p=?

(A) -2
(B) -1
(C) 0
(D) 1
(E) 2

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Gerda 5 years 2021-09-03T05:41:15+00:00 1 Answers 14 views 0

Answers ( )

  1. thienthi
    0
    2021-09-03T05:42:41+00:00
    Reply

    Answer:

    D

    Step-by-step explanation:

    by subtraction of these 2 equation,

    2p = 2

    p = 1

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Giải phương trình 1 ẩn: x + 2 - 2(x + 1) = -x . Hỏi x = ? ( )