Magic equations

Example

+
+
=
36
 
+
+
=
51
 
-
+
=
 
 
+
+
=
30
 
 
 
 
 
 
 
 

Solution

+
+
=
36
 
+
+
=
51
 
-
+
=
28
 
+
+
=
30
 
 
 
10
 
13
 
25
home
home

Magic equations
Magic equations

Number of exercises: