2x+5(15+x)=54?

2006-10-25 3:07 am

should have 計算過程!!!~~

回答 (7)

2006-10-25 3:41 am

2x+5(15+x)=54
2x+75+5x=54
2z+75+5x-75=54-75
7x=-21
x=3

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2006-10-25 3:20 am

2x+5(15+x)=54
2x+75+5x=54
7x+75=54
7x=54-75
7x/7=-21/7
X =-3,,
希望幫到你..

參考: 我自己ar..^^

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2006-10-25 3:18 am

2x+5(15+x)=54
2x+75+5x=54
2z+75+5x-75=54-75
7x=-21
x=-3

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2006-10-25 3:14 am

2x + 5(15+x) = 54
2x + 75 + 5x = 54
7x = -21
x = -3

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2006-10-25 3:13 am

2x+ 5(15+x) = 54
2x+ 75 + 5x = 54
7x+ 75 = 54
7x = 54 - 75
7x = -21
x = -3

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2006-10-25 3:13 am

2x+5(15+x)=54
2x+75+x=54 照炒就ｏｋ
3x+75=54
3x=54-75
3x= -21
x= -7

2006-10-24 19:15:25 補充：
2x 5(15 x)=542x 75 5x=54 照炒就ｏｋ7x 75=547x=54-757x= -21x=- 3

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2006-10-25 3:12 am

2x+5(15+x)=54
2x+75+5x=54
2z+75+5x-75=54-75
7x=-21
x=3

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