Question

a) 39 + ( 31 - x ) = 70

Answer 1

a) 39 + ( 31 - x ) = 70

31 - x = 39 + 70

31 - x = 109

=> x = 31 - 109

=> x = -78

Answer 2

39 + ( 31 - x ) = 70

         31 - x = 70 - 39

         31 - x = 31

               x = 31 - 31

               x = 0

Answer 3

39 + ( 31 - x ) = 70

             31 - x = 70 - 39

             31 - x = 31

                    x = 31 - 31

                    x = 0

Answer 4

nhâm ) 39 + ( 31 - x ) = 70

31 - x = 70 - 39

31 - x = 31

=> x = 0

Answer 5

39 + ( 31 - x ) = 70

31 - x = 70 - 39 

31 - x = 31

x = 31 - 31

x = 0 . 

k tui .

Answer 6

39+(31-x)=70

<=>31-x=70-39

<=>31-x=31

<=>x=31-31

<=>x=0

Vậy x=...

k mik nha

Answer 7

39 + ( 31 - x ) = 70

         31 - x   = 70 - 39

         31 - x = 31

               x = 31 - 31

               x=0

Answer 8

39+(31-X)=70

(=) 31-X=31

(=) X=0