求这个方程的解.快点!
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求这个方程的解.快点!
[4/(5+4)x]/[5×(1-20%)]=[5/(5+4)x-15]/[4×(1+20%)]
[4/(5+4)x]/[5×(1-20%)]=[5/(5+4)x-15]/[4×(1+20%)]
![求这个方程的解.快点!](/uploads/image/z/19265311-55-1.jpg?t=%E6%B1%82%E8%BF%99%E4%B8%AA%E6%96%B9%E7%A8%8B%E7%9A%84%E8%A7%A3.%E5%BF%AB%E7%82%B9%21)
[4/(5+4)x]/[5×(1-20%)]=[5/(5+4)x-15]/[4×(1+20%)]
4/9x÷4=(5/9x-15)÷3.2
4/9x×1/4=(5/9x-15)×5/16
1/9x=5/9x×5/16-15×5/16
1/9x=25/145x-75/16
1/9x+75/16=25/145x
25/145x-1/9x=75/16
16/261x=75/16
x=75/16÷16/261
x=75/16×261/16
x=19575/256
x=75又119/256
4/9x÷4=(5/9x-15)÷3.2
4/9x×1/4=(5/9x-15)×5/16
1/9x=5/9x×5/16-15×5/16
1/9x=25/145x-75/16
1/9x+75/16=25/145x
25/145x-1/9x=75/16
16/261x=75/16
x=75/16÷16/261
x=75/16×261/16
x=19575/256
x=75又119/256