"What is the area? You should be able to solve this"

[Albert Chan]

(08-07-2018 12:41 AM)Thomas Klemm Wrote:  

(08-06-2018 10:52 PM)Albert Chan Wrote:  20 cm^2 + sx = 16 cm^2 + 32 cm^2

That was my reasoning as well except that I was reading it as: \(20+5x=16+32\)
Which would lead me to: \(x=5.6\)

Well, I guess I muffed this one.
But seriously: Why would you use an index \(x\) in \(s_x\)?

I don't get it either, but that sx is what the picture ask to solve ...

Ideally, cm^2 should be left out, and put back at the end.
However, my previous attempt use a dimensionless unit (square side = 4), so units need to be carried to avoid confusion.