Solve the following mathematical puzzle?

Question

?  +  ? = 8
+     +
?  -  ? = 6
=     = 
13    8

Answer 1

Comments

can u elaborate.... i am weak in maths...

Answer 2

3.5 | 4.5
9.5 | 3.5

Answer 3

3.5+4.5=8
4.5+3.5=8
3.5+9.5=13
9.5-3.5=6

Answer 4

(3.5)+(4.5)= 8
+ +
(9.5)- (3.5)= 6
= =
13 8