Răspuns:
[(a-4.5) x24.3 +15.4] x3.2 =88.16
[(a-4.5) x24.3 +15.4] =88.16 : 3.2= 27.55
(a-4.5) x24.3 =27.55-15.4=12.15
a-4.5 = 12.15 : 24.3
a-4.5=0.5 => a= 4.5+0.5= 5
a=5
