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12 - 14
14x= 12(x+3)
14x= 12x+36
14x-12x= 36
2x=36 / :2
x = 18
12 - liczba śliw
x + 3 = 12 + 2
x = 14 - 3
x = 11
11+3=14
Odp.W sadzie rosnie teraz 14 jabłoni.
Ja bym to tak robiła,ale do końca nie jestem pewna.