Select the statement that correctly describes the solution to this system of equations. X+3y=5 Y=4x-7 A

Question

Select the statement that correctly describes the solution to this system of equations.

X+3y=5
Y=4x-7

A. There is no solution
B. There are infinitely many solutions.
C. There is exactly one solution at (2,1).
D. There is exactly one solution at (4,2).

Which 1?

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Bình An 5 years 2021-07-22T08:06:54+00:00 2 Answers 24 views 0

Answers ( )

  1. Orla
    0
    2021-07-22T08:08:16+00:00
    Reply

    Answer:

    C

    Step-by-step explanation:

    if you substitute in for x and y it works

  2. nguyetanh
    0
    2021-07-22T08:08:38+00:00
    Reply

    x+3(4x-7)=5
    x+12x-21=5
    13x-21=5
    13x=26
    x=2

    y=4x-7
    y=4(2)-7
    y=8-7
    y=1

    ANSWER: C. solution at (2,1)

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