8 times a number plus 3 times the number is the same as 9 plus 12 times the number what is the number?

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2006-11-27 13:24:55 · 2 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics

Translating your question into algebra:

8x + 3x = 9 + 12x
11x = 9 + 12x
11x - 11x - 9 = 9 - 9 - 11x + 12x
-9 = x

2006-11-27 13:39:58 · answer #1 · answered by Jim Burnell 6 · 0⤊ 0⤋

8n + 3n = 9 + 12n
11n = 9+12n
-12n -12n
-n = 9
n = -9

2006-11-27 22:17:53 · answer #2 · answered by IF I WERE IN YOUR BODY I WOULD PUNCH MYSELF! 2 · 0⤊ 0⤋