方程概念 | Concepts of Equations
影片內容：
00:18 – 相等的意思 | ideas of equality
02:25 – 未知數及方程 | unknowns and equations
04:03 – 線性的意思 | idea of linearity
05:25 – 點解要學方程? | why equations?
00:18 – 相等的意思 | ideas of equality
02:25 – 未知數及方程 | unknowns and equations
04:03 – 線性的意思 | idea of linearity
05:25 – 點解要學方程? | why equations?