Question

I need help with this one math problem it really confuses me!

A = -3(a + b - 1/3c)

1. c = 3A - (a - b)
2. c = 3A - a - b
3. c = 3a + 3b + A
4. c = 3Aab

I think it's the first one but I'm not really sure...

Answer 1

I'm assuming that the last term in the parentheses is ' one third c'.

First we multiply everything in the parentheses by -3 9(we 'distribute' 3 over the parentheses)

A = -3 * a - 3*b - 3 * -1/3 c

A - -3a - 3b + c


OK so far?

Answer 2

* that's

A = -3a - 3b + c