Hi all...

I hope that someone can help me with this... I just canīt figure it out...

5a-{-[(-3a+2b)-4b]+[-7a-(a-b)]-3b}

and this one...

4c-{(-6d-3c)-[(-8c-11d)-5c+9d]}

2. ## Order of operations

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5a-{-[(-3a+2b)-4b]+[-7a-(a-b)]-3b}

First get rid of the parenthasese around '-3a +2b'

5a-{-[-3a+2b-4b]+[-7a-(a-b)]-3b}

now distribute the '-'

5a-{3a-2b+4b+[-7a-(a-b)]-3b}

now distribute the '-' in front of (a-b)

5a-{3a-2b+4b+[-7a-a+b]-3b}

now get rid of the brackets

5a-{3a-2b+4b-7a-a+b-3b}

Then distribute the negative

5a-3a+2b-4b+7a+a-b+3b

finally combine like terms

5a-3a+7a+a+2b-4b-b+3b

all the b's cancel and you are left with:

10a

You try the second one and I will check your work.

3. ## Thanks for the help kind person...

Thank you, I think I understand it now...

Hereīs the second one...

4c-{(-6d-3c)-[(-8c-11d)-5c+9d]}

4c-{-6d-3c-[-8c-11d-5c+9d]}

4c-{-6d-3c+8c+11d+5c-9d}

4c+6d+3c-8c-11d-5c+9d

da da daaaa...

4d-6c

On the first one I got confused by the parenthaseses and brackets... removed too many at a time...