Given the system of equations, what is the solution? x + 2y = 7 x – 2y = -1 A.) {(-4, 6)} B.) {(-8, -1

Question

Given the system of equations, what is the solution?

x + 2y = 7
x – 2y = -1

A.) {(-4, 6)}
B.) {(-8, -12}
C.) {(3,2)}

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Euphemia 3 years 2021-08-18T22:40:43+00:00 1 Answers 11 views 0

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  1. thuthuy
    0
    2021-08-18T22:41:51+00:00
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    9514 1404 393

    Answer:

      C.)  (3, 2)

    Step-by-step explanation:

    The coefficients of y are opposites, so we can add the two equations to eliminate y.

      (x +2y) +(x -2y) = (7) +(-1)

      2x = 6 . . . . . simplify

      x = 3 . . . . . . matches choice C

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