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3 April, 07:37

What is the solution of the system equations y = -3x + 8 y = - 5x - 2

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  1. 3 April, 10:29
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    Since both equations are equal to y, we can set them equal to each other.

    y = -3x + 8

    y = - 5x - 2

    -3x + 8 = - 5x - 2

    Solve for x. To do this, we need to get x by itself. First, move all the numbers to one side of the equation, and all the variables to the other.

    -3x + 8 = - 5x - 2

    Add 5x to both sides

    -3x+5x + 8=-5x+5x - 2

    2x+8=-2

    Subtract 8 from both sides

    2x+8-8 = - 2-8

    2x=-10

    Now, all the numbers are on one side, with the variables on the other. x is not by itself, it is being multiplied by 2. To undo this, divide both sides by 2

    2x/2 = - 10/2

    x = - 5

    Now, to find y, substitute - 5 in for x in one of the equations.

    y = - 5x - 2

    y = - 5 (-5) - 2

    y=25-2

    y=23

    Put the solution into (x, y)

    The solution is (-5, 23)
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