Solve System

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Across
  1. 2. same lines
  2. 5. rise over run
  3. 7. plot the lines
  4. 9. x,/,+,-
  5. 10. makes opposite disappear
  6. 11. plug it in
  7. 12. the lines cross
Down
  1. 1. to get an answer
  2. 3. you take away from other numbers
  3. 4. you put more numbers to other number
  4. 6. the product is answer
  5. 8. parallel lines