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p =3-4
p =-1
b.q-2=6
q =6+2
q =8
c.2a+3=5
2a =5-3
2a =2
a =1
d.9-3r=6
3r =6-9
3r =-3
r =-1
e. 18=10-2m
2m=10-18
2m=-8
m=-4
f.1=9+ ×
×=9-1
×=8
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