2006-12-11 10:16:24 · 12 answers · asked by Mayra M 1 in Science & Mathematics ➔ Mathematics
3n + 8n - 2 = 20
11n - 2 = 20
11n - 2 + 2 = 20 + 2
11n = 22
11n/11 = 22/11
n = 2
The answer is n = 2
Insert the n value into the equation
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Check
3n + 8x - 2 = 20
3(2) + 8(2) - 2 = 20
6 + 16 - 2 = 20
22 - 2 = 20
20 = 20
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2006-12-11 11:03:22 · answer #1 · answered by SAMUEL D 7 · 0⤊ 0⤋
3n+8n-2=20
11n -2 + 2 = 20 + 2
11n = 22
11n/11 = 22/11
n = 2
2006-12-11 18:18:45 · answer #2 · answered by rm 3 · 0⤊ 0⤋
3n+8n-2=20
Combine like terms
11n+2=20
Isolate the variable
11n=22
Isolate the variable (again)
n=2
2006-12-11 18:19:32 · answer #3 · answered by nightshadyraytiprocshadow 2 · 0⤊ 0⤋
3n + 8n - 2 = 20
11n -2 = 20
11n = 20 +2
n= 22/11
n=2
2006-12-11 18:19:12 · answer #4 · answered by m&m 2 · 0⤊ 0⤋
3n+8n-2=20
11n-2=20
11n-2=20
+2=+2
11n/11=22/11
n=2
2006-12-11 18:31:15 · answer #5 · answered by tony 1 · 0⤊ 0⤋
first, combine similar terms
3n+8n-2=20
11n = 20+2
11n = 22
11n/11 = 22/11
n = 2
Checking: (replacing n by 2)
3 (2) + 8 (2) - 2 = 20
6 + 16 - 2 = 20
22-2 = 20
20 = 20
right?
2006-12-11 18:21:45 · answer #6 · answered by racz_jay25 2 · 0⤊ 0⤋
3n=8n= 11n
11n-2=20
n=2
2006-12-11 18:19:34 · answer #7 · answered by shorty4life 1 · 0⤊ 0⤋
3n+8n-2=20
11n-2=20
11n=22
2=n
2006-12-11 18:21:10 · answer #8 · answered by One With No Name 2 · 0⤊ 0⤋
3n+8n=22
11n=22
n=2! :)
2006-12-11 18:23:34 · answer #9 · answered by behindthesun011 2 · 0⤊ 0⤋
11n - 2 = 20
11n = 20+2
11n = 22
n = 22/11
n = 2
2006-12-11 18:18:08 · answer #10 · answered by revasree 2 · 1⤊ 0⤋