System of equations

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Across
  1. 1. in a system of linear equation this means the collinear
  2. 4. statement that two mathematical expressions are equal
  3. 6. A branch of mathematics
  4. 9. the line is the same, points lie on the same line
  5. 10. one equation is solved for one variable and that solution is substituted int the second equation
Down
  1. 2. where 2 things meet
  2. 3. any value for a variable that makes an inquation or inequality true
  3. 5. 2 or more linear equations to determine the solution to the system
  4. 7. an equation in 2 variables whose graphs in a coordinate plane is a straight line
  5. 8. a group of numbers, symbols and variables that express an operation