Math equation

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123456789101112131415
Across
  1. 2. เสือ
  2. 6. 10^5 = 100,000
  3. 10. ช้าง
  4. 12. axa = 169
  5. 14. bxb = 144
  6. 15. a-7 = 13
Down
  1. 1. a = 50-35
  2. 3. 2b+4 = 20
  3. 4. cxc = 81
  4. 5. 5h = 50
  5. 7. 2x-4 = 32
  6. 8. 10^4 = 10,000
  7. 9. k+13 = 20
  8. 11. 3m = 9
  9. 13. 2a+8 = 10
  10. 14. 7n = 14