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3 July, 11:47

The sum of two numbers is - 1. when twice the first number in four times the second number are added, it equals - 10. what are the two numbers?

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  1. 3 July, 14:16
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    3 and - 4

    Step-by-step explanation:

    First, you write out each statement as an equation:

    x + y = - 1

    2x + 4y = - 10

    Next, rewrite one equation so only x is on one side of the equation, and plug it into the other equation, and solve for y:

    x = - y - 1

    2 (-y - 1) + 4y = - 10

    -2y - 2 + 4y = - 10

    2y = - 8

    y = - 4

    Plug the found value for y into the original equation and solve for x:

    x + y = - 1

    x - 4 = - 1

    x = 3

    Plug both values into the second equation to check your work:

    2x + 4y = - 10

    2 (3) + 4 (-4) = - 10

    6 - 16 = - 10

    -10 = - 10
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