Question

4x-y = 9
2x-3y =-23
Find x and y

Answer 1

Answer:

2x+y=23 (1)

4x−y=19 (2)

Add equations 1 and 2 to eliminate y, because the coefficients of y are the opposite. So, we get

(2x+4x)+(y−y)=23+19

i.e. 6x=42

i.e. x=7

Substituting this value of x in (1), we get

14+y=23

i.e. y=23−14=9

i.e. y=9

Step-by-step explanation:

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Answer 2

Answer:

2x+y=23 (1)

4x−y=19 (2)

Add equations 1 and 2 to eliminate y, because the coefficients of y are the opposite. So, we get

(2x+4x)+(y−y)=23+19

i.e. 6x=42

i.e. x=7

Substituting this value of x in (1), we get

14+y=23

i.e. y=23−14=9

i.e. y=9

Step-by-step explanation:

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