2. Y – 3 = X + 2 2X – 1 = Y Show your work

Question

2. Y – 3 = X + 2
2X – 1 = Y
Show your work

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Bơ 4 years 2021-07-30T08:54:23+00:00 1 Answers 20 views 0

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  1. sori
    0
    2021-07-30T08:55:56+00:00
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    Y – 3 = X + 2 …………………. (1)
    2X – 1 = Y ……………………… (2)

    From (2),
    2X – 1 = Y

    Y = 2X – 1

    Sub (2) into (1),
    (2X-1) – 3 = X + 2

    2X – 1 – 3 = X + 2

    2X – X = 2 + 1 + 3

    X = 6

    Sub x=6 into (1),
    Y = 2(6) – 1

    Y = 12 – 1

    Y = 11

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