1.A number is multiplied by 3 and then decreased by 15. The result is 22.
2.A number is divided by 9 and then decreased by 10. It becomes 13. Find the number.
3.A number is decreased by 15 and then multiplied by 3. The result is 48. Find the number.
4.A number is increased by 10and then divided by 9. It because 2. Find the number
5.The sum of a number and three times this number is 96. What is the number?
幚我做幾條數(20分)
2008-11-07 7:00 am
回答 (1)
2008-11-07 7:12 am
✔ 最佳答案
1. A * 3 -15 = 223 A = 22 + 15
A = 37 / 3
A = 12 1/3
2. A / 9 - 10 = 13
A = ( 13 + 10 ) * 9
A = 207
3. (A - 15) * 3 = 48
A - 15 = 48 / 3
A = 16 + 15
A = 31
4. ( A + 10 ) / 9 = 2
A + 10 = 2 * 9
A = 18 - 10
A = 8
5. (A + 3A) = 96
4 A = 96
A = 96 / 4
A = 24
參考: BY Myself.
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