Mistake in news article - How to Solve a System of Linear Equations

Not entirely sure, if this is the best place for this.

In the following news article first ‘quiz’ seems to have incorrect answer (or it has incorrect example).

y = 2x
y = 3(x + 1)

Does not expand to

2(2x) = 3(x + 1)

What further results propagates to different answer than it should and quiz not having the result matching example to solve.


Agreed. I’m not sure who to contact though.