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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 90%×[（1＋20%）x＋（2200-x）×（1＋15%）]－2200 = 131 .
    Question type: Equation
    Solution:Original question:
     
90
100
((1 +
20
100
) x + (2200 − x )(1 +
15
100
)) − 2200 = 131
    Remove the bracket on the left of the equation:
     Left side of the equation =
90
100
(1 +
20
100
) x +
90
100
(2200 − x )(1 +
15
100
) − 2200
                                             =
90
100
 × 1 x +
90
100
 ×
20
100
 x +
90
100
(2200 − x )(1 +
15
100
) − 2200
                                             =
9
10
 x +
9
50
 x +
90
100
(2200 − x )(1 +
15
100
) − 2200
                                             =
27
25
 x +
90
100
(2200 − x )(1 +
15
100
) − 2200
                                             =
27
25
 x +
90
100
 × 2200(1 +
15
100
) −
90
100
 x (1 +
15
100
) − 2200
                                             =
27
25
 x + 1980(1 +
15
100
) −
90
100
 x (1 +
15
100
) − 2200
                                             =
27
25
 x + 1980 × 1 + 1980 ×
15
100
 −
90
100
 x (1 +
15
100
) − 2200
                                             =
27
25
 x + 1980 + 297 −
90
100
 x (1 +
15
100
) − 2200
                                             =
27
25
 x + 77 −
90
100
 x (1 +
15
100
)
                                             =
27
25
 x + 77 −
90
100
 x × 1 −
90
100
 x ×
15
100
                                             =
27
25
 x + 77 −
9
10
 x −
27
200
 x
                                             =
9
200
 x + 77
    The equation is transformed into :
     
9
200
 x + 77 = 131

    Transposition :
     
9
200
 x = 131 − 77

    Combine the items on the right of the equation:
     
9
200
 x = 54

    The coefficient of the unknown number is reduced to 1 :
      x = 54 ÷
9
200
        = 54 ×
200
9
        = 6 × 200

    We obtained :
      x = 1200
    This is the solution of the equation.



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