very easy Maths

👨🏻‍🏫 學術台數學

Fung

2006-10-30 9:27 pm

5[3(3x-8)-1] = [3(x+1)-(5-x)]
x=?

whole equation please

回答 (3)

用戶6280

2006-11-02 5:15 am

✔ 最佳答案

5[3(3x-8)-1] = [3(x+1)-(5-x)]
5(9x-24-1) = (3x+3-5+x)
45x-120-5 = 4x-2
45x -125 = 4x-2
45x-4x = -2+125
41x = 123
x = 123÷41
x = 3

參考: Lotus, Pokemon Master, I love Pokemon!

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Tenon

2006-10-30 9:33 pm

5[3(3x-8)-1] = [3(x+1)-(5-x)]
5(9x-24-1)=3x+3-5+x
45x-120-5=4x-2
45x-4x= -2+120+5
41x=123
x=123/41
x=3

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用戶160446

2006-10-30 9:31 pm

5[3(3x-8)-1]=[3(x+1)-(5-x)]
5[9x-24-1]=3x+3-5+x
5[9x-25]=4x-2
45x-125=4x-2
41x=123
x=3

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