Question

Daca x=3si y+z=10; 100•x-(9•y+9•z)

Answer 1

100•x-(9•y+9•z)= 
100·x-9(y+z) =
100·3 - 9·10 =
300 - 90 =
 210 

Answer 2

=100x3-9(y+z)=300-9x10=300-90=210