what is x+1 over x-1 = 3 over 4? if possible, show the work?!?!?!?! please and thank you
2006-10-31 15:00:52 · 10 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
Cross multiply to get the answer:
(x+1) / (x-1) = 3/4
So, 4 * (x+1) = 3 * (x-1)
Now you can multiply out, isolate the x's on one side, and solve for x:
4x + 4 = 3x - 3
Subtract 3x from both sides:
x + 4 = -3
Subtract 4 from both sides:
x = -7
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2006-10-31 15:04:53 · answer #1 · answered by I ♥ AUG 6 · 0⤊ 1⤋
(x+1)/(x-1)=3/4 multiply by (x-1)
(x+1)=3(x-1)/4 then
4x+4=3x-3
x=-7
2006-10-31 15:53:36 · answer #2 · answered by KYP 1 · 0⤊ 0⤋
(x+1)/(x-1)=3/4 multiply by 4(x-1)
4(x+1)=3(x-1) distribute terms
4x+4=3x-3 subtract 3x+4 from each side
x=-7
2006-10-31 15:48:03 · answer #3 · answered by yupchagee 7 · 0⤊ 0⤋
(x+1)/(x-1) = 3/4
3(x-1) = 4(x+1)
3x - 3 = 4x + 4
3x = 4x + 3 + 4
3x = 4x + 7
3x - 4x =7
-x = 7
x = -7
Check the solution:
(-7+1)/(-7-1) = -6/-8
= 6/8 (Minus signs cancel each other out)
= 3/4
The answer is correct
2006-11-01 00:01:15 · answer #4 · answered by Akilesh - Internet Undertaker 7 · 0⤊ 0⤋
x+1/x-1 = 3/4
(x+1)(4) = (x-1)(3)
4x + 4 = 3x - 3
4x -3x = -4 - 3
x = -7
2006-10-31 15:13:00 · answer #5 · answered by honeymay 2 · 1⤊ 0⤋
x+4.25=3.5x-a million.5x-0.75 simplify x+4.25=2x-.75 get the x's on one area and the numbers on the different 4.25+.75=2x-x simplify 5=x 3/4x+2<3x-a million get the x's on one area and the numbers on the different 2+a million<3x-3/4x simplify 3<(2+a million/4)x divide the two factors via 2.25 3/2.25
2016-10-03 03:54:50 · answer #6 · answered by ? 4 · 0⤊ 0⤋
honeymay is right the answer is -7
2006-10-31 15:15:52 · answer #7 · answered by Anonymous · 0⤊ 0⤋
it is -7
the first answer you got was correct, just follow their steps
2006-10-31 16:10:42 · answer #8 · answered by Gigi 2 · 0⤊ 0⤋
Don't you have a textbook ....
cheater?
2006-10-31 15:10:05 · answer #9 · answered by a b 2 · 0⤊ 1⤋
2 + 2 = DO YOUR OWN HOMEWORK!
2006-10-31 15:01:56 · answer #10 · answered by Anonymous · 0⤊ 2⤋