Computer Forums Math help

 04-02-2008, 08:26 PM #1 Fully Optimized     Join Date: Apr 2007 Posts: 2,946 Math help One # is 15 more then another. The sum of twice the larger and 3 times the smaller is 182. Find the numbers. so far i got y + 15 = x x + 3y = 182 Now what? __________________ __________________
 04-02-2008, 08:32 PM #2 Guru     Join Date: Jan 2008 Location: U.S. Posts: 7,841 Re: Math help solve for y on both, then substitute. find x. use x to find y. __________________ __________________
 04-02-2008, 08:34 PM #3 Golden Master     Join Date: May 2006 Posts: 7,904 Re: Math help y + 15 = x 2x + 3y = 182 3y = 182 - 2x (y = x - 15)*3 3y = 3x - 45 3x - 45 = 182 - 2x +2x +45 = +45 +2x -------------------- 5x = 227 x = 45.4 y + 15 = 45.4 y= 30.4 x=45.4 __________________ “Adults are just obsolete children and the hell with them.” - Dr. Suess
 04-02-2008, 08:36 PM #4 Fully Optimized     Join Date: Apr 2007 Posts: 2,946 Re: Math help What?? Idk how to do this... lol __________________
 04-02-2008, 08:38 PM #5 BSOD   Join Date: Jun 2007 Posts: 2,505 Re: Math help Yea I am good at math. At first I thought I had it but I didn't. Oh well I got my own homework to do __________________
 04-02-2008, 08:48 PM #6 Golden Master     Join Date: May 2006 Posts: 7,904 Re: Math help The answer is in my problem. You need to set it up so both are: 3y = X then those two Xs equal each other, then you can solve for x in there, and substitute x in for y. __________________ “Adults are just obsolete children and the hell with them.” - Dr. Suess
 04-02-2008, 08:51 PM #7 Daemon Poster     Join Date: Nov 2006 Posts: 941 Re: Math help Y + 15 = X 2X + 3Y = 182 2(Y+15) + 3Y = 182 2Y + 30 + 3Y = 182 5Y + 30 = 182 5Y = 152 Y = 30.4 Y + 15 = X 30.4 + 15 = X X = 45.4 Y = 30.4 Plug it in.. 2(45.4) + 3(30.4) = 182 __________________ My word is bond and bond is life and I will give my life before my word shall fail.
 04-02-2008, 10:40 PM #8 In Runtime     Join Date: Dec 2007 Posts: 391 Re: Math help Algebra 1? __________________ My setup: AMD Athlon 64 X2 Dual-Core 4000+, 2Gb A-data ddr800, MSI K9A2 CF 790X, MSI 2600XT T2D512EZ, Samsung DVD-RW, Ultra 500W PS Vseries, Maxtor 80Gb, Aspire Mid-tower case, Windows xp Home, Westinghouse 19" LCD
 04-03-2008, 01:39 AM #9 Fully Optimized     Join Date: Dec 2007 Posts: 2,449 Re: Math help i feel so stupid not knowing any thing your talking about __________________ __________________ (ASUS P5E X38)__(Q6600@3.4Ghz)__(Innod3D 8800GTS 512Mb 800/1920)__(4Gb corsair XMS2 800Mhz)__(Antec 900)__(Vista 64Bit)_(Zalman 9700) {3DMark06 15211}