求这个方程的解.快点!
来源:学生作业帮 编辑:神马作文网作业帮 分类:数学作业 时间:2024/11/12 08:51:20
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%)]
[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