Answer:
from now on don't ask same qn two times or more it would be waste of your points
got it??
y = -x - 2
this is because the <em>m </em> is the slope and the <em>b </em>is the intersection of the y axis
x+y=5...i
x²-y²=5...ii
from i, x+y=5
x=5-y...iii
substitute iii in ii
(5-y)²-y²=5
25-2y²=5
2y²=20
y²=10
y=✓10
put y=✓10 in i
x+✓10=5
x=5-√10