Daca consideram in paranteza avem (69:23+10) si nu (69:13+10)
avem
3 × [ 90 : 45 + 2 × ( 69 : 23 + 10 )] +105 : 3= 119
= 3 x [ 2 + 2 x ( 3 + 10 ) ] + 35=
= 3 x ( 2 + 2 x 13 ) + 35 =
= 3 x ( 2 + 26 ) + 35 =
= 3 x 28 + 35 =
= 84 + 35 =
= 119
Daca mergem pe varianta cu 69:13 vom avea
3x[90:45+2x(69:13+10)]+105:3=3x(90:45+2x5,307)+105:3=
3x(90:45+10,614)+105:3=
3x2+10,614+105:3=
6+10,614+35=51,614
