Question

[nguyen thi my hao]

a,19+x-(81-97)=-34

b,x-42 la so nguyen duong lon nhat co 2 chu so khac nhau

Answer 1

[Lương Phương Thảo]

a, 19+x-(81-97)=-34

         x-(81-97)=(-34)-19

         x-81+97 =-15

         x+97     =(-15)+81

         x           =36-97

         x           =-61

b, x=98