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5x(6+2xn)=60 aflati pe n




Răspuns :

60:5
6+2n=12x
2n=12x-6
2n=6x
n=3x
5x(6+2xn)=60
6+2xn=60:5
6+2xn=12
2xn=12-6
2xn=6
n=6:2
n=3