Y=4x-1 Y-2=x i need help substitution method​

Question

Y=4x-1
Y-2=x
i need help substitution method​

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Thiên Thanh 4 years 2021-08-04T01:24:03+00:00 1 Answers 11 views 0

Answers ( )

  1. Amity
    0
    2021-08-04T01:25:45+00:00
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    Answer:

    x = 1, y = 3

    Step-by-step explanation:

    x = y – 2, so y = 4 (y – 2) -1

    solve normally now

    y = 4 (y – 2) -1

    y = 4y – 8 – 1 (distribute)

    y = 4y – 9 (simplify)

    +9 -y -y +9

    9 = 3y

    3 = y

    y – 2 = x

    (3) – 2 = x

    x = 1

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