1/w + 7 = -4
Simplify answer as much as possible
2007-03-10 01:01:35 · 6 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
1/w + 7 = - 4
1/w + 7 - 7 = - 1 - 7
1/w = - 11
w(1/w) = - 11(w)
1 = - 11w
1/ - 11 = - 11w / - 11
- 1/11 = w
- - - - - - - - - -s-
2007-03-10 01:14:36 · answer #1 · answered by SAMUEL D 7 · 0⤊ 0⤋
1/w + 7 = -4
Take 7 from both sides
1/w = -11
Multiply by w
1 = -11w
So w = -1/11
Putting back into the original equation:
1/ (-1/11) + 7 = -4
Goes to
-11 + 7 = -4 which is true.
Phew! This is tricky because you are looking at the inverse of a fraction - that was the bit that foxed me, 1 divided by -1/11 actually equals -11
:-)
2007-03-10 09:06:29 · answer #2 · answered by davidbgreensmith 4 · 0⤊ 0⤋
First get rid of the plus 7:
1/w = -4 -7
1/w = -11
Then multiply each side by what's on the bottom (which is w):
(w) x 1/w = (w) x -11
The w's on the left cancel each other out:
1 = w - 11
Put the -11 on the other side to leave w by itself:
1 + 11 = w
12 = w
Therefore, w = 12.
2007-03-10 09:05:35 · answer #3 · answered by charmedchiclet 5 · 2⤊ 0⤋
1/w + 7 = -4
1/w=-11
w=-1/11
2007-03-10 09:14:46 · answer #4 · answered by Anonymous · 0⤊ 0⤋
1/w = -11
w = -1/11
2007-03-10 09:07:43 · answer #5 · answered by Anonymous · 1⤊ 0⤋
I may not be in HL math and I'm very depended on my calculator . . . but hoping that this isn't a trick question doesn't w= -11?
2007-03-10 09:08:00 · answer #6 · answered by Dangmo C 1 · 0⤊ 0⤋