Answer:
It has more than one equal sign but set up like this:
Explanation:
Let's solve for x. 
y+x−1+ 
3 
2 
=−y 
Step 1: Add -y to both sides. 
x+y+ 
1 
2 
+−y=−y+−y 
x+ 
1 
2 
=−2y 
Step 2: Add (-1)/2 to both sides. 
x+ 
1 
2 
+ 
−1 
2 
=−2y+ 
−1 
2 
x=−2y+ 
−1 
2 
Answer: 
x=−2y+ -1/2