x+y=3 y+x= 5 help please

Question

x+y=3
y+x= 5

help please

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Kim Cúc 3 years 2021-08-05T20:07:44+00:00 1 Answers 9 views 0

Answers ( )

  1. danthu
    0
    2021-08-05T20:08:52+00:00
    Reply

    solve by elimination ie eliminate x or y from the equations by performing operations on them.
    first label the equations , to follow the process.
    x – y = 5 —————-(1)
    x+ y = 3 —————-(2)
    If (1) and (2) are added then y will be eliminated.
    (1) + (2) gives : 2x = 8 → x = 4
    now substitute this value of x into either of the 2 equations and solve for y.
    let x = 4 in (1) : 4 – y = 5 → -y = 1 → y = -1
    check in (1) : 4-(-1) = 4+1 = 5
    check in(2) : 4 – 1 = 3

    So your answer is x = 4 , y = -1

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