1, y=x+4
2, y=5x
3, y=7x减4
4, y=10減2x
maths,,,,,,,,,,,,,,,,,help.................
2006-12-01 12:14 am
回答 (1)
2006-12-01 12:18 am
✔ 最佳答案
你d題目係唔係想將x變做主項呢..1, y=x+4
x=y-4
2, y=5x
x=y/5
3, y=7x-4
y+4=7x
x=(y+4)/7
4, y=10-2x
2x=10-y
x=(10-y)/2
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