Question

$x + y = 5andx - y = 3$

Answer 1

Your answer is in this photo

Answer 2

x+y=5
x-y=3-------eq-2
now substitute the values
x=3+y
put the values in equation 1
x+y=5
3+y+y=5
3+2y=5
2y=2
y=1
now we got the value for y
put this value in any of them
x+1=5
x=4