How do you solve an equotion, with 2 variables? |
 Oct 27 2005, 06:15 PM
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#1
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 Senior Member  Group: Member Posts: 103 Joined: Jul 2004 Member No: 31,102  |
Ah for some reason I can't remember.
I know you can substitute it but I dont' know if I'm doing it right. It's a equiangular triangle and they give the measures of the sides and I know they all equal each other I just can't get x & y 4x -y=7 2x+3y=7 Then I get kinda stuck haha.. can anyone help? You don't have to tell me the answer just like an example or whatever |
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Oct 28 2005, 07:00 AM
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#2
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 hi. call me linda. Group: Official Member Posts: 8,187 Joined: Feb 2004 Member No: 3,475 |
You could also multiply the first equation by 3, and get:
12x - 3y = 21. Then, add the second equation to the first so the y cancels out: 12x - 3y = 21 - 2x + 3y = 7 ------------------ 10x = 14 Divide by 10 and you get x=7/5. Then subsitute that into one of the equations and solve for y. |
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Posts in this topic
doubleaxel1951 How do you solve an equotion Oct 27 2005, 06:15 PM
mipadi Choose a variable (let's say x). Now, use one ... Oct 27 2005, 08:08 PM peggysturr Substitution or elimination. Oct 27 2005, 10:12 PM doubleaxel1951 Okay thanks. this can be closed now Oct 28 2005, 02:45 PM
helllla jankyyyy QUOTE(doubleaxel1951 @ Oct 28 2005, 2:45 PM)O... Oct 29 2005, 12:09 AM swtcherriipie I havent done that in 2 weeks dont remind me calcu... Oct 28 2005, 02:49 PM mipadi QUOTE(swtcherriipie @ Oct 28 2005, 3:49 PM)I ... Oct 28 2005, 03:42 PM crazedbaby X is 2 and Y is 1. Yes sirree. Oct 28 2005, 03:47 PM |
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