2x - y = 2,5x + y = -9

Question

`2x - y = 2,5x + y = -9`

Answer 1

x = -1

y = -4

Explanation:

Known :

• 2x - y = 2
• 5x + y = -9

Asked :

• x = ?
• y = ?

Solution :

2x - y = 2

5x + y = -9

Using the elimination method, we can find the value of x.

2x - y = 2

5x + y = -9

_________+

7x = -7

x = -1

Then, we can use substitution method to find the value of y

5x + y = -9

5(-1) + y = -9

-5 + y = -9

y = -9 + 5

y = -4

Conclusion :

So in conclusion, the value of x and y is -1 and -4