1/8
if you don't get all right redo until you do.
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v=12
-15=-27
r=6
1-r=-5
18=v
26= 8+v
n=6
-15 +n =-9
p=1
p-6=-5
m=8
m+4=-12
n=4
10n=40
m=4
m-9=-13
b=8
15+b=23