During lockdowns, I researched viral internet maths sensations. Several of them are what a teenager might recognise as simultaneous equations. In the emoji example above, smiley faces = 4 and ...

Revise working with simultaneous equations for your National 5 maths exam with Bitesize Scotland interactive practice quizzes covering feedback and common errors.

James J. Heckman, Thomas E. Macurdy, A Simultaneous Equations Linear Probability Model, The Canadian Journal of Economics / Revue canadienne d'Economique, Vol. 18, No ...