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2006-09-11 14:50:24 · 8 answers · asked by Espressologie 2 in Science & Mathematics Mathematics

8 answers

Let us solve for 'u'

9 - 4 / [5(u-3)] = 1 ; here i assumed the (u-3) should be in the denominator

8 = 4 / [5(u-3)]

5(u-3) = 4/8 = 1/2

u - 3 = (1/2) / 5 = 1/10

u = 3 + 1/10 = 31/10 = 3.1

If (u-3) is NOT in the denominator then

9 - (4/5) (u-3) = 1

8 = (4/5) (u-3)

u-3 = 8 / (4/5) = 10

u = 10 + 3 = 13

2006-09-11 14:56:08 · answer #1 · answered by Anonymous · 1 0

13
Works like this...
The equation:
9 - 4/5(u-3) = 1
The process:
STEP 1: subtract 9 from both sides
-4/5(u-3) = -8
STEP 2: multiply -1 on both sides
4/5(u-3) = 8
STEP 3: multiply 5 on both sides to remove the denominator:
4(u-3) = 40
STEP 4: divide 4 on both sides of the equation
u-3 = 10
STEP 5: move the 3 to the other side
u = 13

Now replace the 13 in the formula to test it:
9 - 4/5 * (13-3) = 1
9 - 4/5 * 10 = 1
9 - 8 = 1
Yep!

2006-09-11 21:53:56 · answer #2 · answered by The Answer Dog 3 · 0 0

5/ (5u-15) = 1

5= 5u-15

20=5u

4= u

I think.... :)

this would be the answer if 9 and 4 aren't together or considered as a whole quantity as numerators.. . if if 9 is all by itself and
4/5(u-3) is the fraction.. then the answer is 13...

to check... simply replace u in the original equation with the answer 4... you'll get 1=1. try it.

2006-09-11 21:58:11 · answer #3 · answered by Anonymous · 0 1

9 - 4/5(u-3) = 1

Subtract 9 from both sides. This will give you
-4/5(u-3) = -8

Multiply each side by -5/4. This will give you
(u-3) = 10

It is now safe to drop the parenthesis. Add 3 to both sides. This will give you your final answer of
u=13


IT IS NOT 4. HONESTLY.

2006-09-11 22:01:22 · answer #4 · answered by Anonymous · 0 0

9 - (4/5)(u - 3) = 1
(-4/5)(u - 3) = -8
-4(u - 3) = -40
u - 3 = 10
u = 13

2006-09-12 01:22:34 · answer #5 · answered by Sherman81 6 · 0 0

this equals 9- 4/5u + 27=1
4/5u=1-27-9
4/5u = -35
u= 35*5 / 4 (4/5 becomes negative, and 35 being negative, both become positive)
u = 175/4
u = 43.75

2006-09-11 21:54:03 · answer #6 · answered by fabmaster6 3 · 0 1

I think the answer is 4. If its wrong i am sorry!

2006-09-11 21:55:43 · answer #7 · answered by Anonymous · 0 1

id say go with four its the most common answer but if you want mine i got 25 dont ask how.....lol

2006-09-11 22:00:43 · answer #8 · answered by Leah 2 · 0 1

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