Algebra problem: Can you help?
Afternoon, I’m just doing a bit of algebra revision on the BBC GCSE Bitesize website and one question has stumped me: I can’t figure out where I’m going wrong.
Here is the question:
4. If a = b – c, then:
a. c = b – a
b. c = a + b
c. c = a – b
Apparently a is the right answer, but I can’t work out how to get there.
I’ve been taught that when letters/numbers change sides they change their sign as well, therefore I answered b.
Any help is appeciated :) (I could just ask my Maths teacher on Monday but I’m rather impatient)
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