(25+27)-×=14 ,a+28=94-17

52 - х = 14 х = 52 - 14 х = 38 --------------- а + 28 = 77 а = 77 - 28 а = 49

1) (25+27)=52 2) 52-14=38 x=38 1)94-17=77 2)77-28 =49 a=49