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5 ori (6+ 5ori X)=60

Răspuns :

5 * 12x=60
12x=60:5
12x=12
x=12:12
X=1

5(6+5x)=60
30+25x=60
25x=30
x=30/25-simplificam cu 5
x=6/5
x=1 intreg 1/5