Question

x + 3y = 13 : 3x + y = -1​

Answer 1

Explanation:

x+3y=13. (1)

3x+y= -1. ( 2)

multiply equation (2) by 3,

9x+3y= -3. (3)

subtract equation (1) from equation (3),

8x= -16

x= -2

put value of x in equation. (1) ,

(-2)+3y=13

3y=13+2

3y=15

y=5

x= -2. and y=5