2007-04-11 08:45:29 · 9 answers · asked by porcha b 1 in Science & Mathematics ➔ Mathematics
40 - 5n = - 2
40 - 5n + 40 = - 2 + 40
- 5n = 38
- 5n / - 5 = 28 / - 2
n = - 28/2
n = - 14
- - - - - - - - - -s-
2007-04-11 10:41:45 · answer #1 · answered by SAMUEL D 7 · 0⤊ 1⤋
enable x = 5n + a million then: x^2 + 6x - 7 = 0 Factoring this can provide (x + a million) (x - 7) = 0 So x +a million = 0 OR x - 7 = 0 x = -a million OR x = 7 Substituting lower back into the 1st line -a million = 5n + a million ==>-a million -a million = 5n +a million -a million ==> -2 = 5n -2/5 = 5n/5 ==> -2/5 = n (or -.4 in case you like decimals) OR 7 = 5n + a million ==> 7 -a million = 5n +a million -a million ==> 6 = 5n 6/5 = 5n/5 ==> 6/5 = n (or a million.2 in decimals) subsequently n = -.4 or a million.2
2016-12-09 00:23:57 · answer #2 · answered by Anonymous · 0⤊ 0⤋
solve 40-5n=-2?
5n = 40 + 2
n = 42/5 = 8.4
2007-04-11 08:50:52 · answer #3 · answered by atheistforthebirthofjesus 6 · 0⤊ 0⤋
rewriting you have 40+2, or 42=5n, divide each side by 5, you have n=8.4
2007-04-11 08:49:56 · answer #4 · answered by WC 7 · 0⤊ 0⤋
40 - 5n = -2
-5n = -42
n = -42/-5
n = 42/5 OR 8.4
2007-04-11 08:51:08 · answer #5 · answered by Link 4 · 0⤊ 0⤋
40-5n=-2
-5n = -2 - 40
-5n = -42
n=8.4
2007-04-11 08:50:14 · answer #6 · answered by Silly Putty 2 · 0⤊ 0⤋
40-5n=-2
-5n=-42
5n=42
n=42/5
n=8.4
2007-04-11 08:50:54 · answer #7 · answered by Clarinutty 2 · 0⤊ 0⤋
(-2 -40)/-5 = n
2007-04-11 08:50:39 · answer #8 · answered by Anonymous · 0⤊ 0⤋
n= -42/5?
2007-04-11 08:51:41 · answer #9 · answered by Luna_5 2 · 0⤊ 0⤋