Mathematics
         
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           ☆1 equations

[ 1/1 Equation]
    Work: Find the solution of equation X-X÷1.03×0.03-X÷1.03×0.03×0.07×50%-(X÷1.03×80%×30%-2000) = 30000 .
    Question type: Equation
    Solution:Original question:
      X X ÷
103
100
×
3
100
X ÷
103
100
×
3
100
×
7
100
×
50
100
( X ÷
103
100
×
80
100
×
30
100
2000) = 30000
     Left side of the equation = X X ×
3
103
X ×
21
20600
( X ÷
103
100
×
80
100
×
30
100
2000)
                                             =
19979
20600
X ( X ÷
103
100
×
80
100
×
30
100
2000)
    The equation is transformed into :
     
19979
20600
X ( X ÷
103
100
×
80
100
×
30
100
2000) = 30000
    Remove the bracket on the left of the equation:
     Left side of the equation =
19979
20600
X X ÷
103
100
×
80
100
×
30
100
+ 2000
                                             =
19979
20600
X X ×
24
103
+ 2000
                                             =
15179
20600
X + 2000
    The equation is transformed into :
     
15179
20600
X + 2000 = 30000

    Transposition :
     
15179
20600
X = 300002000

    Combine the items on the right of the equation:
     
15179
20600
X = 28000

    The coefficient of the unknown number is reduced to 1 :
      X = 28000 ÷
15179
20600
        = 28000 ×
20600
15179

    We obtained :
      X =
576800000
15179
    This is the solution of the equation.

    Convert the result to decimal form :
      X = 37999.868239



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