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2014-09-01T11:02:42+03:00
145+m-317=631
145+m=631+317
m=631+317-145
m=803

367+247-n=802
614-n=802
-n=188 ⇒ n= -188

p-176+239=467
p-176=288
p=288+176=404



1 5 1
2014-09-01T11:16:40+03:00
A)631+317=948
948-145=803
m=803
b)367+247=614
802-614=188
n-188
c)p=467+176-239
p=404