Answer: 12
Explanation:
step 1 take z.y+x-b+a-o
step 2 lets say that Z=3 Y=2 X=4 B=6 A=9 O=1
step 3 write out the problem 3.2=6+4=10-6=4+9=13-1=12
step 4 when you get this done and you have the same answer as mine show your teacher that you are done just take what i typed for the problem.