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Hope this helps

Date Posted:
2 months ago

I doubt sec 4 students learn inverses in their syllabus though.

I think they do. I learned this in sec4

How else can we solve this without inverse?

We have to call C as (a b c d) and solve some simuls.

Ah right. But that would be 4 equations 4 unknowns. I think they learn 2 equations 2 unknowns only