system of equations crossword

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Across
  1. 3. a method of solving systems of equations by substituting one equation into the other.
  2. 5. the type of problem seen when solving system of equations by elimination and substitution.
  3. 8. the letter seen in an equation.
  4. 9. the number seen beside a variable.
Down
  1. 1. when lines cross over each other
  2. 2. the visual representation of coordinate pairs
  3. 4. a type of answer you get when both sides of the equation are equal.
  4. 6. the system you use to solve an equation visually.
  5. 7. A method of solving system of equations by subtracting the variable