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    总述:本次共解1题。其中
           ☆方程1题

〖 1/1方程〗
    作业:求方程 x+(x*0.8*0.3/2*3.85%)+(x*0.8*0.4/2+(x*0.8*0.3+x*0.8/2*0.3*3.85%))*3.85%+((x*0.8*0.3/2+(x*0.8*0.4+((x*0.8*0.4/2+(x*0.8*0.3+x*0.8/2*0.3*3.85%))*3.85%))+(x*0.8*0.3+x*0.8/2*0.3*3.85%)))*3.85% = 239916.15 的解.
    题型:方程
    解:原方程:
      x + ( x ×
4
5
×
3
10
÷ 2 ×
77
2000
) + ( x ×
4
5
×
2
5
÷ 2 + ( x ×
4
5
×
3
10
+ x ×
4
5
÷ 2 ×
3
10
×
77
2000
)) ×
77
2000
+ (( x ×
4
5
×
3
10
÷ 2 + ( x ×
4
5
×
2
5
+ (( x ×
4
5
×
2
5
÷ 2 + ( x ×
4
5
×
3
10
+ x ×
4
5
÷ 2 ×
3
10
×
77
2000
)) ×
77
2000
)) + ( x ×
4
5
×
3
10
+ x ×
4
5
÷ 2 ×
3
10
×
77
2000
))) ×
77
2000
=
4798323
20
    去掉方程左边的括号:
     方程左边 = x + x ×
4
5
×
3
10
÷ 2 ×
77
2000
+ ( x ×
4
5
×
2
5
÷ 2 + ( x ×
4
5
×
3
10
+ x ×
4
5
÷ 2 ×
3
10
×
77
2000
)) ×
77
2000
+ (( x ×
4
5
×
3
10
÷ 2 + ( x ×
4
5
×
2
5
+ (( x ×
4
5
×
2
5
÷ 2 + ( x ×
4
5
×
3
10
+ x ×
4
5
÷ 2 ×
3
10
×
77
2000
)) ×
77
2000
)) + ( x ×
4
5
×
3
10
+ x ×
4
5
÷ 2 ×
3
10
×
77
2000
))) ×
77
2000
                  = x + x ×
231
50000
+ ( x ×
4
5
×
2
5
÷ 2 + ( x ×
4
5
×
3
10
+ x ×
4
5
÷ 2 ×
3
10
×
77
2000
)) ×
77
2000
+ (( x ×
4
5
×
3
10
÷ 2 + ( x ×
4
5
×
2
5
+ (( x ×
4
5
×
2
5
÷ 2 + ( x ×
4
5
×
3
10
+ x ×
4
5
÷ 2 ×
3
10
×
77
2000
)) ×
77
2000
)) + ( x ×
4
5
×
3
10
+ x ×
4
5
÷ 2 ×
3
10
×
77
2000
))) ×
77
2000
                  =
50231
50000
x + ( x ×
4
5
×
2
5
÷ 2 + ( x ×
4
5
×
3
10
+ x ×
4
5
÷ 2 ×
3
10
×
77
2000
)) ×
77
2000
+ (( x ×
4
5
×
3
10
÷ 2 + ( x ×
4
5
×
2
5
+ (( x ×
4
5
×
2
5
÷ 2 + ( x ×
4
5
×
3
10
+ x ×
4
5
÷ 2 ×
3
10
×
77
2000
)) ×
77
2000
)) + ( x ×
4
5
×
3
10
+ x ×
4
5
÷ 2 ×
3
10
×
77
2000
))) ×
77
2000
                  =
50231
50000
x + x ×
4
5
×
2
5
÷ 2 ×
77
2000
+ ( x ×
4
5
×
3
10
+ x ×
4
5
÷ 2 ×
3
10
×
77
2000
) ×
77
2000
+ (( x ×
4
5
×
3
10
÷ 2 + ( x ×
4
5
×
2
5
+ (( x ×
4
5
×
2
5
÷ 2 + ( x ×
4
5
×
3
10
+ x ×
4
5
÷ 2 ×
3
10
×
77
2000
)) ×
77
2000
)) + ( x ×
4
5
×
3
10
+ x ×
4
5
÷ 2 ×
3
10
×
77
2000
))) ×
77
2000
                  =
50231
50000
x + x ×
77
12500
+ ( x ×
4
5
×
3
10
+ x ×
4
5
÷ 2 ×
3
10
×
77
2000
) ×
77
2000
+ (( x ×
4
5
×
3
10
÷ 2 + ( x ×
4
5
×
2
5
+ (( x ×
4
5
×
2
5
÷ 2 + ( x ×
4
5
×
3
10
+ x ×
4
5
÷ 2 ×
3
10
×
77
2000
)) ×
77
2000
)) + ( x ×
4
5
×
3
10
+ x ×
4
5
÷ 2 ×
3
10
×
77
2000
))) ×
77
2000
                  =
50539
50000
x + ( x ×
4
5
×
3
10
+ x ×
4
5
÷ 2 ×
3
10
×
77
2000
) ×
77
2000
+ (( x ×
4
5
×
3
10
÷ 2 + ( x ×
4
5
×
2
5
+ (( x ×
4
5
×
2
5
÷ 2 + ( x ×
4
5
×
3
10
+ x ×
4
5
÷ 2 ×
3
10
×
77
2000
)) ×
77
2000
)) + ( x ×
4
5
×
3
10
+ x ×
4
5
÷ 2 ×
3
10
×
77
2000
))) ×
77
2000
                  =
50539
50000
x + x ×
4
5
×
3
10
×
77
2000
+ x ×
4
5
÷ 2 ×
3
10
×
77
2000
×
77
2000
                  =
50539
50000
x + x ×
231
25000
+ x ×
17787
100000000
+ (( x ×
4
5
×
3
10
÷ 2 + ( x ×
4
5
×
2
5
+ (( x ×
4
5
×
2
5
÷ 2 + ( x ×
4
5
×
3
10
+ x ×
4
5
÷ 2 ×
3
10
×
77
2000
)) ×
77
2000
)) + ( x ×
4
5
×
3
10
+ x ×
4
5
÷ 2 ×
3
10
×
77
2000
))) ×
77
2000


    
        x≈229112.250044 ,保留6位小数
    
    有 1个解。


解一元一次方程的详细方法请参阅:《一元一次方程的解法》




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