Răspuns :
[(x-1):100+90]:10= 10
[(x-1):100+90] = 10 x 10
( x-1) :100 =100 - 90
( x-1) :100 = 10
x-1 = 10 x 100
x - 1 =1000
x = 1000+1
x = 1001
[(x-1):100+90] = 10 x 10
( x-1) :100 =100 - 90
( x-1) :100 = 10
x-1 = 10 x 100
x - 1 =1000
x = 1000+1
x = 1001