1. x/4+3=2x-1
2.y/3+2/5=y-4/5
教教這兩題方程式
2010-11-03 11:56 pm
回答 (2)
2010-11-04 12:07 am
✔ 最佳答案
1. x/4+3=2x-12x - x/4 = 3 + 1
7x/4 = 4
7x = 16
x = 16/7
2.y/3+2/5=y-4/5
y - y/3 = 2/5 + 4/5
2y/3 = 6/5
2y = 18/5
y = 9/5
參考: Hope the solution can help you^^”
2010-11-04 2:12 am
1.
x/4+3=2x-1
x + 3*4 = 4(2x-1)
x+12 = 8x-4
12+4 = 8x-x
16 = 7x
x = 16/7
2.
y/3+2/5=y-4/5
5y + 2*3 = 15y - 4*3
5y+6=15y-12
6+12=15y-5y
18=10y
y=18/10
y=9/5
x/4+3=2x-1
x + 3*4 = 4(2x-1)
x+12 = 8x-4
12+4 = 8x-x
16 = 7x
x = 16/7
2.
y/3+2/5=y-4/5
5y + 2*3 = 15y - 4*3
5y+6=15y-12
6+12=15y-5y
18=10y
y=18/10
y=9/5
收錄日期: 2021-04-19 23:33:41
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https://hk.answers.yahoo.com/question/index?qid=20101103000051KK00746