What does n= please show how you got this answer
2007-11-09 13:52:13 · 8 answers · asked by tman 1 in Science & Mathematics ➔ Mathematics
9 - 3n + 15 = 30
24 - 3n = 30
3n = - 6
n = - 2
2007-11-09 22:36:31 · answer #1 · answered by Como 7 · 0⤊ 1⤋
9-3(n-5)=30
distribute the -3(REMEMBER ITS A NEGATIVE)
9-3n+15=30
combine like terms
24+3n=30
Subtract 24 from both sides
3n=6
divide by 3 to get n by itself
n=2
the person above me is wrong.
you ALWAYS get rid of grouping symbols(the parenthasis)FIRST
2007-11-09 22:05:01 · answer #2 · answered by Kelsey 4 · 1⤊ 0⤋
9 - 3(n-5) = 30
first subtract 9 on both sides
-3(n-5) = 21
second divide both sides by -3 to take away the parenthesis
n-5 = -7
last add 5 to both sides
answer:
n = -2
2007-11-09 21:56:14 · answer #3 · answered by stackinchips11 2 · 0⤊ 0⤋
n is -2
2007-11-09 21:57:42 · answer #4 · answered by d man 2 · 0⤊ 0⤋
ok 9-3(n-5)=30
9-3n+15=30(2 minus signs always make +)
24-3n=30
-3n=30-24
-3n=6
n=6/-3
n=-2
proof
9-3(-2-5)
9-3(-7)
9-(-21)
9+21(2 minus signs always make +)
30
2007-11-09 22:00:22 · answer #5 · answered by Indi 2 · 0⤊ 0⤋
9-3(n-5) = 30
6(n-5) = 30
6n-30 = 30
6n = 60
n = 10
2007-11-10 00:20:20 · answer #6 · answered by dimples 1 · 0⤊ 0⤋
9-3(n-5)=30
-3(n-5)=21
n-5=-7
n=-2
2007-11-10 00:07:34 · answer #7 · answered by abcde12345 4 · 0⤊ 0⤋
9-3n+15=30
24-3n=30
24-24-3n=30-24
-3n=6
-3n/-3=6/-3
n=-2
2007-11-09 22:15:05 · answer #8 · answered by Dave aka Spider Monkey 7 · 0⤊ 0⤋