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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: 2 questions will be solved this time.Among them
           ☆1 equations
           ☆1 arithmetic calculations

[ 1/2 Equation]
    Work: Find the solution of equation x*199+(260-199)*0.3*x+(30-x)*248+(260-248)*0.3*(30-x) = 0 .
    Question type: Equation
    Solution:Original question:
      x × 199 + (260 − 199) ×
3
10
 x + (30 − x ) × 248 + (260 − 248) ×
3
10
(30 − x ) = 0
    Remove the bracket on the left of the equation:
     Left side of the equation = 199 x + 260 ×
3
10
 x − 199 ×
3
10
 x + (30 − x ) × 248 + (260 − 248) ×
3
10
                                             = 199 x + 78 x −
597
10
 x + (30 − x ) × 248 + (260 − 248) ×
3
10
(30 − x )
                                             =
2173
10
 x + (30 − x ) × 248 + (260 − 248) ×
3
10
(30 − x )
                                             =
2173
10
 x + 30 × 248 − x × 248 + (260 − 248) ×
3
10
(30 − x )
                                             =
2173
10
 x + 7440 − x × 248 + (260 − 248) ×
3
10
(30 − x )
                                             = -
307
10
 x + 7440 + (260 − 248) ×
3
10
(30 − x )
                                             = -
307
10
 x + 7440 + 260 ×
3
10
(30 − x ) − 248 ×
3
10
(30 − x )
                                             = -
307
10
 x + 7440 + 78(30 − x ) −
372
5
(30 − x )
                                             = -
307
10
 x + 7440 + 78 × 30 − 78 x −
372
5
(30 − x )
                                             = -
307
10
 x + 7440 + 2340 − 78 x −
372
5
(30 − x )
                                             = -
1087
10
 x + 9780 −
372
5
(30 − x )
                                             = -
1087
10
 x + 9780 −
372
5
 × 30 +
372
5
 x
                                             = -
1087
10
 x + 9780 − 2232 +
372
5
 x
                                             = -
343
10
 x + 7548
    The equation is transformed into :
      -
343
10
 x + 7548 = 0

    Transposition :
      -
343
10
 x = 0 − 7548

    Combine the items on the right of the equation:
      -
343
10
 x = - 7548

    By shifting the terms and changing the symbols on toth sides of the equation, we obtain :
     7548 =
343
10
 x

    If the left side of the equation is equal to the right side, then the right side must also be equal to the left side, that is :
     
343
10
 x = 7548

    The coefficient of the unknown number is reduced to 1 :
      x = 7548 ÷
343
10
        = 7548 ×
10
343

    We obtained :
      x =
75480
343
    This is the solution of the equation.

    Convert the result to decimal form :
      x = 220.058309

[2/2 Formula]
    Work: Calculate the value of equation 9800-800-600-1800-180 .
    Question type: Mathematical calculation
    Solution:
          9800-800-600-1800-180
        =9000-600-1800-180
        =8400-1800-180
        =6600-180
        =6420
    Answer:9800-800-600-1800-180=6420


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