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On line Solution of Monovariate Equation：
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    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 （x*(0.9-0.5)-6000-12000)*(1-25%) = 2640 .
    Question type: Equation
    Solution:Original question:
     ( x (
9
10
 −
1
2
) − 6000 − 12000)(1 −
25
100
) = 2640
    Remove the bracket on the left of the equation:
     Left side of the equation = x (
9
10
 −
1
2
)(1 −
25
100
) − 6000(1 −
25
100
) − 12000(1 −
25
100
)
                                             = x ×
9
10
(1 −
25
100
) − x ×
1
2
(1 −
25
100
) − 6000(1 −
25
100
) − 12000(1 −
25
100
)
                                             = x ×
9
10
 × 1 − x ×
9
10
 ×
25
100
 − x ×
1
2
(1 −
25
100
) − 6000(1 −
25
100
) − 12000
                                             = x ×
9
10
 − x ×
9
40
 − x ×
1
2
(1 −
25
100
) − 6000(1 −
25
100
) − 12000(1 −
25
100
)
                                             =
27
40
 x − x ×
1
2
(1 −
25
100
) − 6000(1 −
25
100
) − 12000(1 −
25
100
)
                                             =
27
40
 x − x ×
1
2
 × 1 + x ×
1
2
 ×
25
100
 − 6000(1 −
25
100
) − 12000(1 −
25
100
)
                                             =
27
40
 x − x ×
1
2
 + x ×
1
8
 − 6000(1 −
25
100
) − 12000(1 −
25
100
)
                                             =
3
10
 x − 6000(1 −
25
100
) − 12000(1 −
25
100
)
                                             =
3
10
 x − 6000 × 1 + 6000 ×
25
100
 − 12000(1 −
25
100
)
                                             =
3
10
 x − 6000 + 1500 − 12000(1 −
25
100
)
                                             =
3
10
 x − 4500 − 12000(1 −
25
100
)
                                             =
3
10
 x − 4500 − 12000 × 1 + 12000 ×
25
100
                                             =
3
10
 x − 4500 − 12000 + 3000
                                             =
3
10
 x − 13500
    The equation is transformed into :
     
3
10
 x − 13500 = 2640

    Transposition :
     
3
10
 x = 2640 + 13500

    Combine the items on the right of the equation:
     
3
10
 x = 16140

    The coefficient of the unknown number is reduced to 1 :
      x = 16140 ÷
3
10
        = 16140 ×
10
3
        = 5380 × 10

    We obtained :
      x = 53800
    This is the solution of the equation.



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