Solve the system of equations by elimination: −5x+3y=2 −5x−5y=−30

Question

Solve the system of equations by elimination:

−5x+3y=2
−5x−5y=−30

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Nem 7 days 2021-07-22T22:50:24+00:00 2 Answers 2 views 0

Answers ( )

    0
    2021-07-22T22:51:42+00:00

    Answer:

    (2,4)

    Step-by-step explanation:

    multiply both sides by -1

    -5x+3y=2

    5x+5y=30

    sum the equations vertically to eliminate at least one variable

    8y=32

    divide both sides by 8

    8÷32=4

    y=4

    substitute the given value of y into the equation

    -5+3×4=2

    solve the equation for X

    x=2

    check ordered pair (2,4) is the solution of the system of equations

    -5×2+3×4=2

    -5×2-5×4= -30

    2=2

    -30=-30

    solution is (2,4)

    0
    2021-07-22T22:52:11+00:00

    Answer: 1 : -5x + 3y = 2 Equation 2 : -5x – 5y = -30 Because both equations the system of equations by elimination.

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