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Calculați:x•[1-0,5+0,(3)-0,25]=3-0,2

Răspuns :

x(0,5+3/9-25/100)=2,8
x(1/2+1/3+1/4)=28/10
x*13/12=14/5
x=14/5:13/12=14/5*12/13=168/65