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    Overview: 1 questions will be solved this time.Among them
           ☆1 equations

[ 1/1 Equation]
    Work: Find the solution of equation 0.5*14*(6+3/2n) = 72-0.5*14*(6+3/2n)-1/2*(-n)*(6-2/3n)*1/2*(10+n)*(-2/3n) .
    Question type: Equation
    Solution:Original question:
     
1
2
× 14(6 + 3 ÷ 2 × n ) = 72
1
2
× 14(6 + 3 ÷ 2 × n )1 ÷ 2 × ( - n )(62 ÷ 3 × n ) × 1 ÷ 2 × (10 + n )( - 2 ÷ 3 × n )
     Left side of the equation = 7(6 + 3 ÷ 2 × n )
    The equation is transformed into :
     7(6 + 3 ÷ 2 × n ) = 72
1
2
× 14(6 + 3 ÷ 2 × n )1 ÷ 2 × ( - n )(62 ÷ 3 × n ) × 1 ÷ 2 × (10 + n )( - 2 ÷ 3 × n )
    Remove the bracket on the left of the equation:
     Left side of the equation = 7 × 6 + 7 × 3 ÷ 2 × n
                                             = 42 +
21
2
n
    The equation is transformed into :
     42 +
21
2
n = 72
1
2
× 14(6 + 3 ÷ 2 × n )1 ÷ 2 × ( - n )(62 ÷ 3 × n ) × 1 ÷ 2 × (10 + n )( - 2 ÷ 3 × n )
     Right side of the equation = 727(6 + 3 ÷ 2 × n )
1
4
( - n )(62 ÷ 3 × n )(10 + n )( - 2 ÷ 3 × n )
    The equation is transformed into :
     42 +
21
2
n = 727(6 + 3 ÷ 2 × n )
1
4
( - n )(62 ÷ 3 × n )(10 + n )( - 2 ÷ 3 × n )
    Remove the bracket on the right of the equation:
     Right side of the equation = 727 × 67 × 3 ÷ 2 × n
1
4
( - n )(62 ÷ 3 × n )(10 + n )( - 2 ÷ 3 × n )
                                               = 7242
21
2
n
1
4
( - n )(62 ÷ 3 × n )(10 + n )( - 2 ÷ 3 × n )
                                               = 30
21
2
n
1
4
( - n )(62 ÷ 3 × n )(10 + n )( - 2 ÷ 3 × n )
                                               = 30
21
2
n +
1
4
n (62 ÷ 3 × n )(10 + n )( - 2 ÷ 3 × n )
                                               = 30
21
2
n +
1
4
n × 6(10 + n )( - 2 ÷ 3 × n )
1
4
n × 2 ÷ 3
                                               = 30
21
2
n +
3
2
n (10 + n )( - 2 ÷ 3 × n )
1
6
n n (10 + n )( - 2 ÷ 3 × n )
                                               = 30
21
2
n +
3
2
n × 10( - 2 ÷ 3 × n ) +
3
2
n n ( - 2 ÷ 3 × n )
1
6
                                               = 30
21
2
n + 15 n ( - 2 ÷ 3 × n ) +
3
2
n n ( - 2 ÷ 3 × n )
1
6
n
                                               = 30
21
2
n 15 n × 2 ÷ 3 × n +
3
2
n n ( - 2 ÷ 3 × n )
                                               = 30
21
2
n 10 n n +
3
2
n n ( - 2 ÷ 3 × n )
1
6
n
                                               = 30
21
2
n 10 n n
3
2
n n × 2 ÷ 3 × n
                                               = 30
21
2
n 10 n n 1 n n n
1
6
n
                                               = 30
21
2
n 10 n n 1 n n n
1
6
n
                                               = 30
21
2
n 10 n n 1 n n n
5
3
n
                                               = 30
21
2
n 10 n n 1 n n n +
5
3
n
                                               = 30
21
2
n 10 n n 1 n n n +
10
9
n
                                               = 30
21
2
n 10 n n 1 n n n +
10
9
n
                                               = 30
21
2
n 10 n n 1 n n n +
10
9
n

    The solution of the equation:
        n1≈-8.887590 , keep 6 decimal places
        n2≈9.999134 , keep 6 decimal places
    
    There are 2 solution(s).


解程的详细方法请参阅:《方程的解法》



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