Linear Equation in two variables

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Across
  1. 3. If a1/a2 = b1/b2 ≠ c1/c2 then the lines are ________
  2. 5. If a1/a2 = b1/b2 = c1/c2 then the lines are __________
  3. 6. The method of eliminating one variable in order to solve a pair of linear equations
  4. 9. If a1/a2 ≠ b1/b2 then the lines are ___________
Down
  1. 1. A pair of linear equations in two variables, which have a solution
  2. 2. A pair of linear equations which are equivalent and have infinitely many distinct common solutions
  3. 4. A pair of linear equations which have no solution
  4. 7. The method of substituting the value of one variable by expressing it in the terms of the other variable in order to solve a pair of linear equations
  5. 8. When one of the variables is ____, the equation reduces to a linear equation in one variable