TTS Aljabar

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Across
  1. 1. 10 (1/2 b-1)
  2. 3. 70y∶(-7)
  3. 6. 4a-6a
  4. 7. 2(2x+4)-5(x-3)
Down
  1. 1. (x+3)/2×10
  2. 2. (20y-12) ∶4
  3. 4. 8a-9-2a+6
  4. 5. (4b+8) ∶ 2/3