Răspuns:
100 - [ 50 - ( 38 - 5 × a ) × 8 - 2 ] : 3 + 4 = 96 / - 4
100 - [ 50 - ( 38 - 5 × a ) × 8 - 2 ] : 3 = 92 / + 100
[ 50 - ( 38 - 5 × a ) × 8 - 2 ] × 3 = 192 / ÷ 3
50 - ( 38 - 5 × a ) × 8 - 2 = 64 / + 50
( 38 - 5 × a ) × 8 - 2 = 114 / + 2
( 38 - 5 × a ) × 8 = 116 / ÷ 8
38 - 5 × a = 20.75 / + 38
5 × a = 58,75
a = 58.75 ÷ 5
