(25+27)-x=14 52-x=14 x=52-14 x=38 (25+27)-38=14 14=14
a+28=94-17 a+28=77 a=77-28 a=49 49+28=94-17 77=77
(25+27)-x=14 52-x=14 x=52-14 x=38 (25+27)-38=14 14=14
a+28=94-17 a+28=77 a=77-28 a=49 49+28=94-17 77=77