✔ 最佳答案
1. a = 5
2. m = 1/5
3. y = 0.7
4. y = 3
5. y = 5
6. y = 1.3
7. x = 20
8. x = 0.7
9. z = 1
10. y = 0.825
11. y = -0.9
2011-04-21 22:36:57 補充:
12.
a = -4
3.
無論是 6.3 = 2y + 4.9 或者 6.3 - 2y = 4.9
y = 0.7
2011-04-22 22:35:08 補充:
第12題是方程。
0.5(a + 4) = (a + 4) x 10%
0.5a + 2 = 0.1a + 0.4
0.4a = -1.6
a = -4
參考: sioieng, sioieng, sioieng
1. 4a+3=5a-2,-a=-5,a=5
2. 1.6+5m=2.6,5m=1,m=0.2
3. 6.3-2y+4.9,-2y=-1.4,y=0.7
4. 20y-6=12+14y,6y=18,y=3
5. 14y-8=17+9y,5y=25,y=5
6. 8.5-6+y=3.8,2.5+y=3.8,y=1.3
7. 3x+25=5x-1,-2x=-26,x=13
8. 4(2.8-3x)=2.8,11.2-12x=2.8,-12x=-8.4,x=0.7
9. 0.8+5z=4.8+z,4z=4,z=1
10. 7-6y=2y+0.4,-8y=-6.6,y=0.825
11. 0.6X32=21-2y,19.2=21-2y,-1.8=-2y,y=0.9
12. 0.5(a+4)=(a+4)X10%,0.5a+2=0.1a+0.4,0.4a=-1.6,a=-4
最後提醒你,結果不重要,重要的昰過程
希望你看到這過程之後,你就會算了
2011-04-30 21:47:04 補充:
我算錯了
7. 3x+25=5x-15
-2x=-40,x=20