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求方程解釋和解答步驟!
發問:
我在書店裏買了一本數學練習自己做，但系遇到有D題目唔識， 睇答案又冇解答步驟同解釋，所以想問下你地! 答案有冇無所謂! 但系我要解釋和解答步驟!1. 47- p = 342. 126 e = 213. 28 2b = 74. 11+4c = 515. 21 x 5e40 7 = 126. 11 ÷ 33 244a = 27. 20 - 3d 4 =88. 8+ 5z 6 =239. 6 5 ( 4r-3) =6 【 五分之六乘以 4r-3】10. 1 = 2x -1 5 2111.... 顯示更多 我在書店裏買了一本數學練習自己做，但系遇到有D題目唔識， 睇答案又冇解答步驟同解釋，所以想問下你地! 答案有冇無所謂! 但系我要解釋和解答步驟! 1. 47- p = 34 2. 126 e = 21 3. 28 2b = 7 4. 11+4c = 51 5. 21 x 5e 40 7 = 12 6. 11 ÷ 33 244a = 2 7. 20 - 3d 4 =8 8. 8+ 5z 6 =23 9. 6 5 ( 4r-3) =6 【 五分之六乘以 4r-3】 10. 1 = 2x -1 5 21 11. 7 = 2(3X-5) 5 12. 50 - 2(18-Y) = 24 13. 5+ 2(2+X) = 23 14. 18 - 3 = 15 【 18- 四分之三乘以d 等於 15】 4 d 幫下手! 求知識管理員唔好刪左呢個問題!!! 呢份唔系功課!!! 唔問你地真系唔知問邊個啦!!!>< 更新: 好像有點措啊.. 第八題答案不是18嗎?
1. 47- p = 34 47=34+p 13=p p =13 2. 126/e = 21 126=21e 6=e e=6 3. 28/2b = 7 28 = 7 * 2b 28 = 14b 2 = b b = 2 4. 11+4c = 51 4c = 51-11 4c = 40 c = 40 5. 21/40 * 5e/7 = 12 105e / 40*7 = 12 105e / 280 = 12 105e = 3360 e = 32 6. misunderstood 7. 20 - 3d / 4 = 8 80 - 3d = 32 80-32 = 3d 48 = 3d 16 = d d = 16 8. 8 + 5z/6 = 23 64 + 5z = 138 5z = 74 z = 14.8 9. 6/5 * (4r - 3) = 6 4r - 3 = 6 / (6/5) 4r - 3 = 6 * 5/6 4r - 3 = 5 4r = 8 r = 2 10. 1/5 = (2x-1)/21 21 = 5(2x-1) 21 = 10x - 5 26 = 10x 2.6 = x x = 2.6 11. 7 = 2(3X-5)/5 35 = 2(3X - 5) 35 = 6X - 10 45 = 6X 9 = X X = 9 12. 50 - 2(18 - Y ) = 24 50 - 36 + 2Y = 24 14 + 2Y = 24 2Y = 10 Y = 5 13. 5+2(2+X) = 23 5 + 4 + 2X = 23 9 + 2X= 23 2X = 14 X =7 14. 18 - 3d/4 = 15 72 - 3d = 15 72 - 15 = 3d 57 = 3d 19 = d d = 19 解釋一陣補上。
其他解答:
求方程解釋和解答步驟!
發問:
我在書店裏買了一本數學練習自己做，但系遇到有D題目唔識， 睇答案又冇解答步驟同解釋，所以想問下你地! 答案有冇無所謂! 但系我要解釋和解答步驟!1. 47- p = 342. 126 e = 213. 28 2b = 74. 11+4c = 515. 21 x 5e40 7 = 126. 11 ÷ 33 244a = 27. 20 - 3d 4 =88. 8+ 5z 6 =239. 6 5 ( 4r-3) =6 【 五分之六乘以 4r-3】10. 1 = 2x -1 5 2111.... 顯示更多 我在書店裏買了一本數學練習自己做，但系遇到有D題目唔識， 睇答案又冇解答步驟同解釋，所以想問下你地! 答案有冇無所謂! 但系我要解釋和解答步驟! 1. 47- p = 34 2. 126 e = 21 3. 28 2b = 7 4. 11+4c = 51 5. 21 x 5e 40 7 = 12 6. 11 ÷ 33 244a = 2 7. 20 - 3d 4 =8 8. 8+ 5z 6 =23 9. 6 5 ( 4r-3) =6 【 五分之六乘以 4r-3】 10. 1 = 2x -1 5 21 11. 7 = 2(3X-5) 5 12. 50 - 2(18-Y) = 24 13. 5+ 2(2+X) = 23 14. 18 - 3 = 15 【 18- 四分之三乘以d 等於 15】 4 d 幫下手! 求知識管理員唔好刪左呢個問題!!! 呢份唔系功課!!! 唔問你地真系唔知問邊個啦!!!>< 更新: 好像有點措啊.. 第八題答案不是18嗎?
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最佳解答:1. 47- p = 34 47=34+p 13=p p =13 2. 126/e = 21 126=21e 6=e e=6 3. 28/2b = 7 28 = 7 * 2b 28 = 14b 2 = b b = 2 4. 11+4c = 51 4c = 51-11 4c = 40 c = 40 5. 21/40 * 5e/7 = 12 105e / 40*7 = 12 105e / 280 = 12 105e = 3360 e = 32 6. misunderstood 7. 20 - 3d / 4 = 8 80 - 3d = 32 80-32 = 3d 48 = 3d 16 = d d = 16 8. 8 + 5z/6 = 23 64 + 5z = 138 5z = 74 z = 14.8 9. 6/5 * (4r - 3) = 6 4r - 3 = 6 / (6/5) 4r - 3 = 6 * 5/6 4r - 3 = 5 4r = 8 r = 2 10. 1/5 = (2x-1)/21 21 = 5(2x-1) 21 = 10x - 5 26 = 10x 2.6 = x x = 2.6 11. 7 = 2(3X-5)/5 35 = 2(3X - 5) 35 = 6X - 10 45 = 6X 9 = X X = 9 12. 50 - 2(18 - Y ) = 24 50 - 36 + 2Y = 24 14 + 2Y = 24 2Y = 10 Y = 5 13. 5+2(2+X) = 23 5 + 4 + 2X = 23 9 + 2X= 23 2X = 14 X =7 14. 18 - 3d/4 = 15 72 - 3d = 15 72 - 15 = 3d 57 = 3d 19 = d d = 19 解釋一陣補上。
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