Answer: 20
Reason: They're opposite meaning they are the same when compared to the side
Answer:
the Slope is 
Step-by-step explanation:
3*circle= 12
circle=4 <=======
Plug circle value in
diamond+2= 5*(4)
diamond+2=20
diamond=18 <=====
Plug circle and diamond value in
2(4)=18+2*triangle
8=18+2*triangle
-10=2*triangle
-5= triangle <=======