Răspunsuri

2014-11-06T18:06:49+02:00
A) [ 2 x( 2X + 4 ) +4] :15 = 4              ( x- inmultit ;  X- necunoscuta )
 4X +( 8 + 4) :15=4
4X+ 12 :15 = 4
4X= (4 x 15) -12
4X= 60-12
4X= 48
x =12