Posted by **Geoff** on Thursday, February 4, 2010 at 2:57pm.

Hi, could someone possibly check my answers to these algebra questions? Its not my strong point so have been struggling a little (or alot if they are all wrong!)

3m-8-5m+10 = 2-2m

4(2-6x) = 8-24x

7(a+3)-5 = 7a + 16

2x-3(4y-x) = 2x-12y-9x

2(4y-1)+5y(3-2y) = 2(4y-1) +5y(3-2y)

If any are wrong would it be possible for some advice? Thanks in advance for taking the time to check them.

- Algebra -
**Geoff**, Thursday, February 4, 2010 at 3:34pm
Sorry, the last one should be

2(4y-1)+5y(3-2y) = 6y +15y-2y^2

- Algebra -
**Reiny**, Thursday, February 4, 2010 at 4:19pm
for the last two, you are not done

You also have an error in the second last one

2x-3(4y-x)

= 2x-12y-3x

= -x - 12y

last one also contains an error.

correct form:

2(4y-1)+5y(3-2y)

= 8y - 2 + 15y - 10y^2

= 23y - 2 - 10y^2

- Algebra -
**Geoff**, Friday, February 5, 2010 at 1:49am
Brilliant! Thanks alot for your help

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