1)
A = 3 x B = 3 x 74 = 222
B = C : 9 = 666 : 9 = 74
C = 2 x D = 2 x 333 = 666
D = E : 3 = 999 : 3 = 333
E = 999
Rezolvare printr-un exercitiu, cu metoda mersului invers:
999 : 3 x 2 : 9 x 3 = 333 x 2 : 9 x 3 = 666 : 9 x 3 = 74 x 3 = 222
2)
A = 2 x B = 2 x 342 = 684
B = C : 3 = 1 026 : 3 = 342
C = 6 x D = 6 x 171 = 1 026
D = E : 2 = 342 : 2 = 171
E = 3 x 114 = 342
3 x 114 : 2 x 6 : 3 x 2 = 342 : 2 x 6 : 3 x 2 = 171 x 6 : 3 x 2 = 1 026 : 3 x 2=
= 342 x 2 = 684