Respostas

2014-04-13T17:40:55-03:00
A+38=57 ------ A=57-38 = 29
23*N=161 ----  N=161/23=7
421-R=303 ---- R=421-303=118
S-98=124  ----  S=124+98=222
210/X=14 --- X=210/14=15
1 5 1