Question

5x+2y=19 and x-y=1 by using elimination method​

Answer 1

Step-by-step explanation:

multiply x-y = 1 by 2

2x -2 y = 2

Add both the equations

5x + 2y= 19

+ 2x - 2y = 2

7x = 21

x = 3

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Answer 2

Answer:

x = 3

y = 2

Step-by-step explanation:

5x + 2y = 19 - eq. 1

x - y = 1 - eq. 2

Multiply 5 in eq. 2

5(x - y = 1) = 5x - 5y = 5 - eq. 3

Subtract eq. 1 and eq. 3

5x + 2y = 19

5x - 5y = 5

- + -

-----------------

7y = 14

y = 2

Substitute value of y in eq. 2

x - y = 1

x - 2 = 1

x = 3