Question

(x+y=4
(x-2y=1



fast plz​

Answer 1

Answer:

x+y=4

y=4-x

x-2y=1

x-2(4-x)=1

x-8+2x=1

3x=1+8

x=3

y=1

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Answer 2

Answer

x+y = 4 _[1]

x-2y = 1 _[2]

subtracting [2] from [1] we get

x+y - [x-2y]=4-1

3y=3

y=1

substituting the value of y in [1]

x+1=4

x=4-1

x=3