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On line Solution of Monovariate Equation：
    Input any unary equation directly, and then click the "Next" button to obtain the solution of the equation.
    It supports equations that contain mathematical functions.
    Current location：Equations > Monovariate Equation > The history of univariate equation calculation > Answer

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

[ 1/1 Equation]
    Work: Find the solution of equation 7500/(210+74.88)+10000/(210+62.4)+30000/(210+10.4) = a .
    Question type: Equation
    Solution:Original question:
     7500 ÷ (210 +
1872
25
) + 10000 ÷ (210 +
312
5
) + 30000 ÷ (210 +
52
5
) = a
     Multiply both sides of the equation by:(210 +
1872
25
)
     7500 + 10000 ÷ (210 +
312
5
) × (210 +
1872
25
) + 30000 ÷ (210 +
52
5
) × (210 +
1872
25
) = a (210 +
1872
25
)
    Remove a bracket on the left of the equation:：
     7500 + 10000 ÷ (210 +
312
5
) × 210 + 10000 ÷ (210 +
312
5
) ×
1872
25
 + 30000 ÷ (210 +
52
5
) × (210 +
1872
25
) = a (210 +
1872
25
)
    Remove a bracket on the right of the equation:：
     7500 + 10000 ÷ (210 +
312
5
) × 210 + 10000 ÷ (210 +
312
5
) ×
1872
25
 + 30000 ÷ (210 +
52
5
) × (210 +
1872
25
) = a × 210 + a ×
1872
25
    The equation is reduced to :
     7500 + 2100000 ÷ (210 +
312
5
) + 748800 ÷ (210 +
312
5
) + 30000 ÷ (210 +
52
5
) × (210 +
1872
25
) = a × 210 + a ×
1872
25
    The equation is reduced to :
     7500 + 2100000 ÷ (210 +
312
5
) + 748800 ÷ (210 +
312
5
) + 30000 ÷ (210 +
52
5
) × (210 +
1872
25
) =
7122
25
 a
     Multiply both sides of the equation by:(210 +
312
5
)
     7500(210 +
312
5
) + 2100000 + 748800 ÷ (210 +
312
5
) × (210 +
312
5
) + 30000 ÷ (210 +
52
5
) × (210 +
1872
25
)(210 +
312
5
) =
7122
25
 a (210 +
312
5
)
    Remove a bracket on the left of the equation:
     7500 × 210 + 7500 ×
312
5
 + 2100000 + 748800 ÷ (210 +
312
5
) × (210 +
312
5
) + 30000 ÷ (210 +
52
5
) × (210 +
1872
25
)(210 +
312
5
) =
7122
25
 a (210 +
312
5
)
    Remove a bracket on the right of the equation:：
     7500 × 210 + 7500 ×
312
5
 + 2100000 + 748800 ÷ (210 +
312
5
) × (210 +
312
5
) + 30000 ÷ (210 +
52
5
) × (210 +
1872
25
)(210 +
312
5
) =
7122
25
 a × 210 +
7122
25
 a ×
312
5
    The equation is reduced to :
     1575000 + 468000 + 2100000 + 748800 ÷ (210 +
312
5
) × (210 +
312
5
) + 30000 ÷ (210 +
52
5
) × (210 +
1872
25
)(210 +
312
5
) =
299124
5
 a +
2222064
125
 a
    The equation is reduced to :
     4143000 + 748800 ÷ (210 +
312
5
) × (210 +
312
5
) + 30000 ÷ (210 +
52
5
) × (210 +
1872
25
)(210 +
312
5
) =
9700164
125
 a
     Multiply both sides of the equation by:(210 +
312
5
)
     4143000(210 +
312
5
) + 748800(210 +
312
5
) + 30000 ÷ (210 +
52
5
) × (210 +
1872
25
)(210 +
312
5
)(210 +
312
5
) =
9700164
125
 a (210 +
312
5
)
    Remove a bracket on the left of the equation:
     4143000 × 210 + 4143000 ×
312
5
 + 748800(210 +
312
5
) + 30000 ÷ (210 +
52
5
) × (210 +
1872
25
)(210 +
312
5
)(210 +
312
5
) =
9700164
125
 a (210 +
312
5
)
    Remove a bracket on the right of the equation:：
     4143000 × 210 + 4143000 ×
312
5
 + 748800(210 +
312
5
) + 30000 ÷ (210 +
52
5
) × (210 +
1872
25
)(210 +
312
5
)(210 +
312
5
) =
9700164
125
 a × 210 +
9700164
125
 a ×
312
5
    The equation is reduced to :
     870030000 + 258523200 + 748800(210 +
312
5
) + 30000 ÷ (210 +
52
5
) × (210 +
1872
25
)(210 +
312
5
)(210 +
312
5
) =
407406888
25
 a +
3026451168
625
 a

    
        a≈199.153746 , keep 6 decimal places    
    There are 1 solution(s).

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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