Răspuns :
[(30+113+a/4)/29+2000]/5-66-335=0
(143/29+a/4*29+2000)/5-401=0
(143/29+a/116+2000)/5-401=0
143/29*5+a/116*5+400-401=0
143/145+a/580-1=0
143*4+a-580=0
a=580-572=8
(143/29+a/4*29+2000)/5-401=0
(143/29+a/116+2000)/5-401=0
143/29*5+a/116*5+400-401=0
143/145+a/580-1=0
143*4+a-580=0
a=580-572=8
[(30+113+a:4):29+2000]:5-66-335=0 [(143+a:4):29+2000]:5-66=0+335⇒335 [(143+a:4):29+2000]:5=335+66⇒401 [(143+a:4):29+2000]=401x5⇒2005 (143+a:4):29=2005-2000⇒5 (143+a:4)=5x29⇒145 a:4=145 -143 a:4=2⇒a=2x4⇒a=8