please help, Solve the system of equations using elimination. −2x + 3y = 13 x + y = 11 (−5, 1)

Question

please help, Solve the system of equations using elimination.

−2x + 3y = 13
x + y = 11

(−5, 1)
(−3, 3)
(3, 8)
(4, 7)

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Tryphena 3 weeks 2023-01-14T16:14:11+00:00 1 Answer 0 views 0

Answer ( 1 )

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    2023-01-14T16:15:37+00:00

    -2x + 3y = 13
    -3(x + y = 11)
    take the whole bottom equation and multiply by -3 to eliminate the 3y
    -2x + 3y = 13
    -3x -3y = -33
    cancel out 3y
    -2x = 13
    -3x = -33
    add -2 to -3 and 13 to -33
    to get -5x = -20
    divide -5 on both sides
    x = 4
    then you can do the exact same steps to find the y coordinates, but if x is 4 then the coordinate point is (4,7)

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