以下為一條方程式，求x。
2(3x+9)+9(5x+20) = 606
x=?
2006-12-04 13:56:19 · 18 個解答 · 發問者 章魚 7 in 科學 ➔ 數學
2(3x+9)+9(5x+20) = 606
6x+18+45x+180=606
51x+198=606
51x=408
x=8
2006-12-04 14:01:26 · answer #1 · answered by ? 6 · 0⤊ 0⤋
thx+good
2006-12-12 13:02:41 · answer #2 · answered by Alfred 3 · 0⤊ 0⤋
2(3x+9)+9(5x+20) = 606
6x+18+45x+180 = 606
51x + 198 = 606
51x = 408
x = 8
2006-12-12 12:07:23 · answer #3 · answered by raymond yu 2 · 0⤊ 0⤋
2(3x+9)+9(5x+20) = 606
6x+18+45x+180 = 606
51x+198=606
51x=606-198
51x=408
x=8
2006-12-11 09:04:10 · answer #4 · answered by Agony 2 · 0⤊ 0⤋
2(3x+9)+9(5x+20) = 606
2x3x+2x9+9x5x+9x20=606
6x+18+45x+180=606
51x+198=606
51x=606-198
51x=408
x=8
2006-12-04 16:24:09 · answer #5 · answered by chanhm2005 2 · 0⤊ 0⤋
2(3X +9) + 9(5X +20) = 606
6X + 18 + 45X+180 = 606
51X = 606 - 18 - 180
X= 8
2006-12-04 14:43:33 · answer #6 · answered by ? 2 · 0⤊ 0⤋
6x+18+45x+180=606
51x+198=606
51x=408
x=8
2006-12-04 14:09:58 · answer #7 · answered by ? 2 · 0⤊ 0⤋
2(3x+9)+9(5x+20)=606
6x+18+45x+180=606
51x=408
x=8
2006-12-04 14:05:03 · answer #8 · answered by natchauhk 2 · 0⤊ 0⤋
2(3x+9)+9(5x+20)=606
6x+18+45x+180=606
51x+198=606
51x=408
x=8
2006-12-04 14:03:45 · answer #9 · answered by ? 2 · 0⤊ 0⤋
6x + 18 + 45x + 180 = 606
51x = 408
x = 8
2006-12-04 14:02:42 · answer #10 · answered by Cathy 2 · 0⤊ 0⤋
2(3x+9)+9(5x+20) = 606
6x + 18 + 45x + 180 = 606
51x = 408
x = 8
2006-12-04 14:01:39 · answer #11 · answered by ? 7 · 0⤊ 0⤋