5x + 7 = 3x + 21?
回答 (6)
2008-01-13 9:45 am
✔ 最佳答案
5x - 3x = 21 - 72x = 14
x = 7
2008-01-09 1:05 pm
5x + 7 = 3x + 21
5x - 3x = -7 + 21
2x = 14
x = 14/2
x = 7
5x - 3x = -7 + 21
2x = 14
x = 14/2
x = 7
2008-01-09 12:36 pm
2X = 14
X = 7
X = 7
2008-01-09 12:32 pm
2x = 14
x =7
x =7
2008-01-09 12:30 pm
Put all unknowns on one side of the equation and everything else on the other.
Subtract 3x from both sides
2x+7=21
Subtract 7 from both sides
2x=14
Divide both sides by 2
x=7
Subtract 3x from both sides
2x+7=21
Subtract 7 from both sides
2x=14
Divide both sides by 2
x=7
2008-01-09 12:28 pm
2x = 14
x = 7
x = 7
收錄日期: 2021-05-01 01:29:20
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