3(x+2y)-2(3x-y)=?

Simplificatation, evaluation, linear equations, linear graphs, linear inequalities, basic word problems, etc.
fowler_966
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3(x+2y)-2(3x-y)=?

Postby fowler_966 » Thu Jul 26, 2012 5:36 am

I need help with this. I have the answer, which is 8Y-3X, but how is it solved? I am studying to take a placement test and i haven't taken a math course in at least 6 years. thanks for anyone who can help!

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little_dragon
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Re: 3(x+2y)-2(3x-y)=?

Postby little_dragon » Thu Jul 26, 2012 6:21 pm

fowler_966 wrote:I need help with this. I have the answer, which is 8Y-3X, but how is it solved?

U do like they show here: http://www.purplemath.com/modules/simparen.htm
3(x+2y)=3(x)+3(2y)=3x+6y
-2(3x-y)=-2(3x)-2(-y)=-6x+2y
then add 3x&-6x, 6y&2y to get:-3x+8y
U can C abt neg nubmers here: http://www.purplemath.com/modules/negative.htm

fowler_966 wrote:I am studying to take a placement test and i haven't taken a math course in at least 6 years.

they have smthng on placement tests here: http://www.purplemath.com/modules/placment.htm
:wave:

fowler_966
Posts: 7
Joined: Thu Jul 26, 2012 5:30 am
Contact:

Re: 3(x+2y)-2(3x-y)=?

Postby fowler_966 » Thu Jul 26, 2012 9:16 pm

thank you so much! very helpful and greatly appreciated :D


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