23137 X X = 2758 X X = 15 X X = 4324 = 34 X + 52 = 113 X

2. Tìm X:

2

3

1

7

x X =

2

7

5

8

x X =

1

5

x X =

4

4

=

3

4

X +

5

2

=

11

3

X :

7