solve the following proportion for u?

0 ⤊

-20/u = -4/u+4

2007-03-10 01:14:50 · 3 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics

-20/u=-4/u+4
=(-4+4u)/u
-20+4=4u
-16/4=u
u=-4

2007-03-10 01:23:34 · answer #1 · answered by govid r 1 · 0⤊ 0⤋

4/u - 20/u = 4
-16=4u
u= -4

IF,
-20/u = -4/(u+4)
-20u-80 = -4u
-16u=80
u= -5

2007-03-10 01:20:09 · answer #2 · answered by SS 2 · 0⤊ 0⤋

-20/u = -4/u+4
-20u-80=-4u
-16u=80
u = -5

2007-03-10 01:18:58 · answer #3 · answered by Kiamehr 3 · 0⤊ 1⤋