Question

How do you solve the following system: # 8x - y = 13 , 5x+y=-7 #?

Answer 1

Solution: `x=6/13, y = -9 4/13`

Explanation:

`8 x- y = 13 (1) ; 5 x+ y = -7 (2)` Adding equations (1) and (2)

we get `13 x = 6 :. x = 6/13` Putting `x= 6/13` in equation (1)

we get , `8*6/13- y = 13 or y= 48/13-13 or y = (48-169)/13` or

`y= -121/13 = -9 4/13`

Solution: `x=6/13, y = -9 4/13` [Ans]