Algebra ProblemDate: 8/7/96 at 9:19:29 From: Anonymous Subject: Algebra I am stuck! Please help me! 2t-12t+18=0 Date: 8/7/96 at 9:41:43 From: Doctor Patrick Subject: Re: Algebra Hi! To solve 2t-12t+18 = 0 let's first combine the like terms so that we have less to deal with. While we can't add or subtract anything to the 18 yet, we can subtract the 12t from the 2t. Do you understand why we can do this? Subtracting 12t from 2t gives us 2t-12t = -10t, right? So now our problem is -10t+18 = 0. The next step is to get the variable (t) alone on one side of the equation so that we can solve for it. If we add 8t to both sides we get 8t -10t +18 = 0 +10t. When we simplify this we get 18 = 8t. Do you see how we got this? Now let's solve for t. We know that 18 = 10t, so let's divide both sides of the problem by 10 so we can get the t alone on one side of the problem. 18/10 = 10t/10. When we do the division we get 18/10 = 1.8 and 10t/10 = t. This makes our expression 1.8 = t. We know know the value for t, so the problem is solved. -Doctor Patrick, The Math Forum Check out our web site! http://mathforum.org/dr.math/ |
Search the Dr. Math Library: |
[Privacy Policy] [Terms of Use]
Ask Dr. Math^{TM}
© 1994- The Math Forum at NCTM. All rights reserved.
http://mathforum.org/dr.math/