x + y = 15 5x – y = 9 Elimination method (4, ? ) what number is the ?​

Question

x + y = 15
5x – y = 9
Elimination method

(4, ? )

what number is the ?​

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King 5 months 2021-08-04T11:14:11+00:00 2 Answers 6 views 0

Answers ( )

  1. mocmien2
    0
    2021-08-04T11:15:21+00:00
    Reply

    4 + y = 15….1
    20 – y = 9…..2

    ….1*5
    20 + 5y = 75….3

    ….3 – …..2
    4y = 60
    y = 15

    the answer for (?) is 15
    i’m not sure if this 100% correct but i’m trying my best to help you

  2. kimchi2
    0
    2021-08-04T11:15:22+00:00
    Reply

    The ? Is 11.

    You add the equations to get rid of one variable, then you have 6x=24 then you divide both sides and you have x=4, then you substitute the given value of x and you are left with 5*4 – y = 9. And the solution or well possible solution is y = 11 which gives youuuuu. (x , y) = (4 , 11)

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