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18 July, 14:44

Using the problem below, solve and explain how you got the solution to the system of equation.

-x-2y=1

x+y=2

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Answers (1)
  1. 18 July, 15:45
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    (5, - 3)

    y = - 3

    x = 5

    Step-by-step explanation:

    -x-2y=1

    x+y=2

    solve the equation

    -x-2y=1

    x=2-y

    substitute the value of x into an equation

    - (2-y) - 2y=1

    remove parenthesis

    -2-y-2y=1

    subtract y to 2y

    -2-y=1

    add 2 from both sides

    -y=3

    divide both sides by - y

    y = - 3

    substitute the value of y into an equation

    x=2 - (-3)

    remove parenthesis

    x=2+3

    add 2 to 3

    x=5

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    (5,-3)

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