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216.1. Identity.

Check the correct answer!

Is the given expression an identity?
x+5x-2x=2(x+x)
Grade:
7
Subject
Algebra
Theme
Simple algebric expression transformation
Subtheme
Identity

Solve tasks to find hidden Geo point coordinates

  1. Algebra: Opposite type inequalities.
  2. Algebra: Concept of equation.
  3. Geometry: Point belongs (or not) to the straight line (beam, line segment), half-plane, crossed straight lines, beam, opposite beams, line segment, properties.
  4. Geometry: Point belongs (or not) to the straight line (beam, line segment), half-plane, crossed straight lines, beam, opposite beams, line segment, properties.
  5. Geometry: Angle, angle edges and peak, value, degree, measurement.
  6. Algebra: Numerical equalities.
  7. Geometry: Narrow, wide, straight, extended, opened, full angle. Equal angles, bisector.
  8. Algebra: Functions expression with formula, table, diagram
  9. Algebra: Numerical equalities.
  10. Algebra: Connection concept
  11. Algebra: Linear inequalities ax + b > 0, where a, b ∈ Q
  12. Algebra: Monomial normal form
  13. Algebra: Coordinate beginning point
  14. Algebra: Rational number
  15. Algebra: Monomial normal form
  16. Algebra: Mutually opposite monomials.
  17. Algebra: Concept of equation.
  18. Algebra: Ordinary and decimal fractions
  19. Algebra: Identity.
  20. Algebra: Ordinary and decimal fractions
  21. Algebra: Equation properties.
  22. Algebra: Monomial normal form
  23. Algebra: Direct proportionality function y = kx
  24. Algebra: Polynomial opposite polynomial.
  25. Geometry: Angle, angle edges and peak, value, degree, measurement.
  26. Algebra: Equation roots.
  27. Algebra: Function y = x²
  28. Algebra: Percent and proportions
  29. Algebra: Quadrant
  30. Algebra: Notation –x < 3 or x ∈ (– ∞; 3)
  31. Geometry: Triangle angle sum, straight angle cathetus, hypotenuse, Right-angled triangle similarity signs.
  32. Geometry: Point belongs (or not) to the straight line (beam, line segment), half-plane, crossed straight lines, beam, opposite beams, line segment, properties.
  33. Geometry: Broken line and elements, elementary broken line, closed broken line, broken lines length, polygon, angles, edges peaks, diagonal, polygon perimeter.
  34. Geometry: Concept definition, concept sign.
  35. Algebra: Linear inequality solution
  36. Algebra: Contracted multiplication formula: addition and subtraction square; square difference.
  37. Algebra: Diagram y = kx + b (drawing)
  38. Algebra: Variable value.
  39. Geometry: Angle, angle edges and peak, value, degree, measurement.
  40. Geometry: Equal figures, line segments, lengths, midpoints, distance between two points.
  41. Algebra: Abscissa axis
  42. Algebra: Connection concept