Răspuns :
(x + 217 ) : 100 +1980 = 2000
(x+217) :100 = 2000 - 1980
( x+217) :100 = 20
x+217 = 20x100
x+217 = 2000
x= 2000-217
x= 1783
(x+217) :100 = 2000 - 1980
( x+217) :100 = 20
x+217 = 20x100
x+217 = 2000
x= 2000-217
x= 1783