Anonymous
Anonymous asked in Science & MathematicsMathematics · 5 months ago

math questions?

4x - 5y = 195

what is x and y

7 Answers

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  • 5 months ago

    4x - 5y = 195

    x = (5y + 195)/4

    y = 4x/5 - 39

  • 5 months ago

    There are more variables, 2, than equations, 1, so there are infinitely many solutions.

  • 5 months ago

    4x-5y=195

    =>

    5y=4x-195

    =>

    y=(4x-195)/5

    =>

    there are infinitely many

    solutions of (x,y), for if

    we are given a number

    of x, there is always a

    number of y to correspond

    it by calculation with the

    above equation.

    If the integral solutions are

    needed, then

    y=4x/5-39

    =>

    x=5k

    y=4k-39

    or (5k, 4k-39) is a solution,

    where k=an integer. There

    are infinitely many solutions.

  • Mike G
    Lv 7
    5 months ago

    An infinite number of solutions.

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  • DWRead
    Lv 7
    5 months ago

    4x - 5y = 195

    5y = 4x - 195

    y = ⅘x - 39

  • mizoo
    Lv 7
    5 months ago

    4x - 5y = 195

    4x = 195 - 5y

    x = (1/4)(195 - 5y)

    5y = 4x - 195

    y = (1/5)(4x - 195)

  • You have 2 variables and 1 equation. This means that you cannot find unique solutions. The best you can do is relate one variable to the other

    4x - 195 = 5y

    y = (4/5) * x - 39

    If we restrict x and y to integers, then when x = 5k, we'll have solution sets

    y = (4/5) * 5k - 39

    y = 4k - 39

    k = 0 , x = 5k = 5 * 0 = 0 , y = 4 * k - 39 = 4 * 0 - 39 = 0 - 39 = -39 ::: (0 , -39)

    k = 1 , x = 5 , y = 4 - 39 = -35 ::: (5 , -35)

    k = 2 , x = 10 , y = -31 ::: (10 , -31)

    (15 , -27)

    (20 , -23)

    (25 , -19)

    (30 , -15)

    (35 , -11)

    (40 , -7)

    (45 , -3)

    (50 , 1)

    And so on.

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