Răspunsuri

2014-11-03T14:30:41+02:00

2/3*a+1/4*a=99, de unde a*(2/3+1/4)=99

a*((2*4+1*3)/12)=99

a*((8+3)/12)=99

a=(99*12)/11

a=99/11*12

a=9*12

a=108

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