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x+y=3 y+x= 5 help please
Question
x+y=3
y+x= 5
help please
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Mathematics
3 years
2021-08-05T20:07:44+00:00
2021-08-05T20:07:44+00:00 1 Answers
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Answers ( )
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