I have been away from my computer for 3 days so was unable to do my typing test on Tuesday. I’ll do that today.
I’ve just spent ~2hrs on systems of equations today. I did a worksheet of 8 simple problems, and the problem you gave to Eternity in their tutoring topic. I got them all correct.
Before researching systems of equations I did some with just using substitution and simplifying. Then I learned the method of subtracting equations, which I practised using on the worksheet problems.
Here is some of my working for the worksheet problems:
