# Substitution and Simplification

• Sep 22nd 2011, 05:48 PM
whereitsbeen
Substitution and Simplification
expression

Thank You. This is what I got

M=-2 P=4

3P-M
3MP

3*4-2
3*-2*4

= 10
-24

= -5
12

the answer is suppsed to be -7/12 ???

anyone?
• Sep 22nd 2011, 05:52 PM
Ackbeet
Re: Substitution and Simplification
Can you show the work you've done in plugging the numbers in? Incidentally, math is case-sensitive. m is not equal to M.
• Sep 22nd 2011, 05:58 PM
whereitsbeen
Re: Substitution and Simplification
done

Quote:

Originally Posted by Ackbeet
Can you show the work you've done in plugging the numbers in? Incidentally, math is case-sensitive. m is not equal to M.

• Sep 22nd 2011, 06:01 PM
Ackbeet
Re: Substitution and Simplification
OK, that's a good correction. But you still haven't posted your work yet.
• Sep 22nd 2011, 06:16 PM
whereitsbeen
Re: Substitution and Simplification
expression

Thank You. This is what I got

M=-2 P=4

3P-M
3MP

3*4-2
3*-2*4

= 10
-24

= -5
12

the answer is suppsed to be -7/12 ???
• Sep 22nd 2011, 06:25 PM
skeeter
Re: Substitution and Simplification
Quote:

Originally Posted by whereitsbeen
expression

Thank You. This is what I got

M=-2 P=4

3P-M
3MP

3*4-2 ... here ... should be 3*4 - (-2)
3*-2*4

= 14
-24

= -7
12

...