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MathematicsMathematics
24 January, 20:30

Solve the system using an equivalent system

{-2x - y = 0

{3x - y = 10

A. (4,-2)

B. (-2,4)

C. (2,-4)

D (-4,2)

+3
Answers (1)
  1. 24 January, 23:33
    0
    Add y to both sides in 1st equation

    -2x=y

    sub - 2x for y in2nd equation

    3x - (-2x) = 10

    3x+2x=10

    5x=10

    divide 5

    x=2

    sub back

    -2x=y

    -2 (2) = y

    -4=y

    (x, y)

    (2,-4)

    C is ans
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