(2,0 ĐIỂM) TÌM X BIẾT

x

16 8 9

− − =

 x  −

 

30 15 10

 

16 9 8

− = +

x −

30 10 15

16 11

− =

30 30

11 16

= +

5 1

x = =

30 6

5

− =

18 9

− −

( 18).( 5) 90

= =

x

9 9

=

10

2

2

−   =

3 1

x  

4 1

x − 9 =

1 4

x = + 9

13

x = 9

⇒ =

13

=

x 9

x − 9

GV: Nguyễn Hữu Phúc 0888014879 Facebook: https://facebook.com/nhphuclk

Website: https://chiasefull.com Youtube:https://youtube.com/nguyenhuuphuc2017