11y-9=7y+19
=
11y-9=7y+19
2007-07-27 1:54 am
回答 (9)
2007-07-27 1:57 am
✔ 最佳答案
11Y-9=7Y+19SOLVE
11Y-7Y=19+9
4Y=28
4Y/4=28/4
Y=7
2007-07-28 10:55 pm
11y-9=7y+19
11y=7y+28
4y=28
y=7
11y=7y+28
4y=28
y=7
2007-07-27 6:50 am
11y-9=7y+19
11y-7y=19+9
4y=28
y=27
11y-7y=19+9
4y=28
y=27
2007-07-27 1:59 am
11y-9=7y+19
11y-7y=19+9
4y = 28
y = 28 / 4
y = 7
11y-7y=19+9
4y = 28
y = 28 / 4
y = 7
2007-07-27 1:57 am
11y-9=7y+19
11y-9+9=7y=19+9
11y=7y+28
11y-7y=7y+28-7y
4y=28
y=7
11y-9+9=7y=19+9
11y=7y+28
11y-7y=7y+28-7y
4y=28
y=7
2007-07-27 1:57 am
11y-9=7y+19
11y-7y= 19+9
4y=28
y=28/4
y=7
11y-7y= 19+9
4y=28
y=28/4
y=7
2007-07-27 1:57 am
11y - 9 = 7y + 19
11y - 7y = 19 + 9
4y = 28
y = 7
11y - 7y = 19 + 9
4y = 28
y = 7
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https://hk.answers.yahoo.com/question/index?qid=20070726000051KK03708