Răspuns:
a= 2.56 ( aproximativ 3 )
Explicație pas cu pas:
24x36-[ 180-2x(50-35:a):9]=5x3+13x15+40:8
864 - [180 x (50-35 : a ) : 9 ] = 15+195 + 5
864 - [ 180 x (50-35:a ) : 9 ] = 215
[180 x (50-35 : a ) : 9 ] = 864 - 215
[ 180 x (50-35 : a ) : 9 ] = 649
180 x (50-35 : a ) : 9 = 649
180 x (50-35:a) = 649 x 9
180 x (50-45;a) = 5841
(50-45 : a ) = 5841 : 180
50-45 : a = 32,45
45 : a = 50-32,45 => 45 : a = 17,55 => a=45 : 17,55 => a=2.56 ( aproximativ 3 )
