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| 2017/07/04 13:59:29瀏覽48｜回應0｜推薦0 | |
| 標題: 數學-解方程 中一題2 發問: 10;] 19-7b-5b= -53(負53) 11;] 2(2x-1)=6 12;] 3(2-z) = -9(負9) 13;] 16= -8(5p+8) 14;] 5(7+3q)+12=2 15;] 7q=15+11q-3 16;] 2b-6=b+7 17;] 2p+1 = 0.4p+9 18;] 6m+4m-2=8+5m 19;] 7+2e=9e-14-6e 20;] 5(m-1)=3m-7 更新: 唔該各位既解答 "
此文章來自奇摩知識+如有不便請留言告知 最佳解答:10] 19-7b-5b=-53 19-12b=-53 19+53=12b 72=12b 12b=72 b=6 11]2(2x-1)=6 2x-1=6/2 2x-1=3 2x=3+1 2x=4 x=2 12;] 3(2-z) = -9(負9) 2-z=-9/3 2-z=-3 2+3=z 5=z z=5 其他解答: 10. 3 11. 4 12. 5 13. -2 14. -3 15. -3 16. 13 17. 5 18. 2 19. 21 20. -1|||||10) 19-7b-5b = -53 19-12b = -53 -12b = -72 b = 6 11) 2(2x-1) = 6 4x-2 = 6 4x = 8 x = 2 12)3(2-z) = -9 6-3z = -9 -3z = -15 z = 5 13)16= -8(5p+8) 16 = -40p-64 80 = -40p -2 = p p = -2 14) 5(7+3q)+12=2 35+15q+12 = 2 47+15q = 2 15q = -45 q = -3 15)7q=15+11q-3 7q = 12+11q -4q = 12 q = -3 16)2b-6=b+7 2b-b = 7+6 b = 13 17)2p+1 = 0.4p+9 2p-0.4p = 9-1 1.6p = 8 p = 5 18)6m+4m-2=8+5m 10m-2 = 8+5m 10m-5m = 8+2 5m = 10 m = 2 19)7+2e=9e-14-6e 7+2e = 3e-14 2e-3e = -14-7 -e = -21 e = 21 20)5(m-1)=3m-7 5m-5 = 3m-7 5m-3m = -7+5 2m = -2 m = -1|||||10;] 19-7b-5b= -53(負53) -12b=-72 b=6 11;] 2(2x-1)=6 4x-2=6 4x=8 x=2 12;] 3(2-z) = -9(負9) 6-3z=-9 -3z=-15 z=5 13;] 16= -8(5p+8) 16=-40p-64 -40p=60 p=-1.5 14;] 5(7+3q)+12=2 35+15q+12=2 15q=-45 q=-3 15;] 7q=15+11q-3 -4q=12 q=-3 16;] 2b-6=b+7 b=13 17;] 2p+1 = 0.4p+9 1.6p=8 p=5 18;] 6m+4m-2=8+5m 10m-2=8+5m 5m=10 m=2 19;] 7+2e=9e-14-6e 21=e 20;] 5(m-1)=3m-7 5m-5=3m-7 2m=-2 m=-1|||||10) 19-7b-5b = -53 19-12b = -53 -12b = -72 b = 6 11) 2(2x-1) = 6 4x-2 = 6 4x = 8 x = 2 12)3(2-z) = -9 6-3z = -9 -3z = -15 z = 5 13)16= -8(5p+8) 16 = -40p-64 80 = -40p -2 = p p = -2 14) 5(7+3q)+12=2 35+15q+12 = 2 47+15q = 2 15q = -45 q = -3 15)7q=15+11q-3 7q = 12+11q -4q = 12 q = -3 16)2b-6=b+7 2b-b = 7+6 b = 13 17)2p+1 = 0.4p+9 2p-0.4p = 9-1 1.6p = 8 p = 5 18)6m+4m-2=8+5m 10m-2 = 8+5m 10m-5m = 8+2 5m = 10 m = 2 19)7+2e=9e-14-6e 7+2e = 3e-14 2e-3e = -14-7 -e = -21 e = 21 20)5(m-1)=3m-7 5m-5 = 3m-7 5m-3m = -7+5 2m = -2 m = -1 |
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