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a +158= 362 433 -a = 226 522+ a = 304

Răspuns :

a +158= 362
a=362-158
a=204
p:204+158=362

433 -a = 226
a=433-226
a=207
p:433-207=226

522- a = 304
a=522-304
a=218
p:522-218=304