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x-1/5=3/10 va rog .......

Răspuns :

x-1/5=3/10 => amplificam 1/5 cu 2
x-2/10=3/10
x=3/10+2/10
x=5/10
Sper ca te-am ajutat
x-1/5=1/10
Aducem la acelasi numitor 10

10x-2=1
10x=3
x=3/10