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afla termenul necunoscut ,y+214-310=216


Răspuns :

y+214-310=216
y+214=216+310
y+214=526
y=526-214
y=312
verificare
312+214-310=216
526-310=216
y+214-310=216
y+214=216+310
y+214=526
y=526-214
y=312