−5y+3x=3 −8y+9x=−12 ​ What is X and Y please.

Question

−5y+3x=3
−8y+9x=−12
​
What is X and Y please.

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Philomena 4 years 2021-08-06T00:44:37+00:00 2 Answers 17 views 0

Answers ( )

  1. bonexptip
    0
    2021-08-06T00:46:02+00:00
    Reply

    Answer:

    y=-3

    x=-4

    Check:

    -5(-3)+3(-4) =3

    15-12=3

    3=3 ✅

    -8(-3)+9(-4)=-12

    24-36=-12

    -12=-12✅

  2. thanhcong
    0
    2021-08-06T00:46:19+00:00
    Reply

    Answer:

    ( -4, -3 )

    Step-by-step explanation:

    Let’s solve by elimination. Reason being there are no variables without coefficients.

    −5y+3x=3     Multiply equation by 3. Each term.  

    −8y+9x=−12

    -15y + 9x = 9       Subtract the to equations

    -8y  + 9x = -12

    ___________

    -7y = 21

    y = -3

    Substitute y into original equation

    -5(-3) + 3x = 3

    15 + 3x = 3            Subtract 15 both sides

    3x = -12                 Divide by 3, both sides

    x = -4

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