เฉลยตัวอย่างข้อสอบเก่า...

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13x + 6

12x + 6

15

14

6

2

96

6

252

x+ 6

252

x 1

252

x

5

3

5

3

(5

3)

5

3

26

2

41

330

123

990

135000

900

10

x

10

x + 5

1

2

1

2

150

2x

150

3x

1

2

22

7

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