Answer:
rearrange them properly to get
x-y=7
-3x+y=12
( by elimination method)
x-y = 7
-3x+y=
(x+ –3x) + (–y+y) = (7+12)
-2x+0= 19
x= -9.5
from eqn(i)
x-y=7
-9.5 - y=7
-y=16.5
y= -16.5
10 ft +12 ft =22ft so it 22 ft.
22ft-4ft is 18ft.
18 ft is the answer
The solution possible can be correct by dividing both sides by -5 ;Sooo x>-5.....
