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8 November, 12:10

Solve by substitution x-2y = - 25 and 3x-y=0

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  1. 8 November, 12:29
    0
    x=5 and y=15

    Step-by-step explanation:

    x-2y=-25

    x-2y+2y=-25+2y (Add 2y to both sides)

    x=2y-25

    Step: Substitute2y-25forxin3x-y=0:

    3x-y=0

    3 (2y-25) - y=0

    5y-75=0 (Simplify both sides of the equation)

    5y-75+75=0+75 (Add 75 to both sides)

    5y=75

    5y

    5

    =

    75

    5

    (Divide both sides by 5)

    y=15

    Step: Substitute 15fory in x=2y-25:

    x=2y-25

    x = (2) (15) - 25

    x=5 (Simplify both sides of the equation)
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