Question

tìm x:

20 + x - 10 = 100

Answer 1

20 + x - 10 = 100

20 + x = 100 + 10

20 + x = 110

        x = 110 - 20

        x = 90

Answer 2

20+x-10=100

20+x=100+10

20+x=110

x=110-20

x=90

Answer 3

20 + x - 10 = 100

20+x          =100+10

20+x          =110

x                =110-20

x                 =90

Answer 4

20 + x - 10 = 100

20 + x = 100 + 10

20 + x = 110

x = 110 - 20

x = 90

vậy x = 90

Answer 5

20 + x - 10 = 100

20 + x        = 100 + 10 

20 + x        = 110

    x            = 110 - 20

Answer 6

20+x= 100+10

20+x=110

      x= 110-20

      x= 90

tk nhé