WHAT is the the mystery number A=B+5,B=C+7,C=the different between13and9.D=A-B. A= B=, C=, D=
"C=the different between13and9" --- > C = 4
" B = C+7" ---> B = 4+7 = 11
A = B+5 ---> A = 11+5 = 16
D = A-B
D = 16-11 = 5
" B = C+7" ---> B = 4+7 = 11
A = B+5 ---> A = 11+5 = 16
D = A-B
D = 16-11 = 5