HELP ASAP

For example...a shirt that is size  3  in country  A  is size  3 + 1 = 4  in country  B .

A shirt that is size  4  in country  B  is size  4 - 4 = 0  in country  C .

So... a shirt that is size  3  in country  A  is size  0  in country  C .

A shirt that is size  x  in country  A  is size  (x + 1) - 4  in country  C .

f(x)  =  t( s(x) )  =  t( x + 1 )  =  (x + 1) - 4  =  x - 3

f(x)  =  x - 3

Thanks, hectictar......!!!!!!

This can also be looked  at  as a composition of functions

Where A  = x        B  = x +  1     and C  = x - 4

So   

( A ° B ° C) =

B(C)  =  (x - 4 ) + 1  =  x - 3

A ( B(C) ) =   A (x - 3)  =     [ x - 3 ]  is the conversion