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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 x/(15+3)+x÷(15-3) = 7.5 .
    Question type: Equation
    Solution:Original question:
      x ÷ (15 + 3) + x ÷ (15 − 3) =
15
2
     Multiply both sides of the equation by:(15 + 3)
      x + x ÷ (15 − 3) × (15 + 3) =
15
2
(15 + 3)
    Remove a bracket on the left of the equation:：
      x + x ÷ (15 − 3) × 15 + x ÷ (15 − 3) × 3 =
15
2
(15 + 3)
    Remove a bracket on the right of the equation:：
      x + x ÷ (15 − 3) × 15 + x ÷ (15 − 3) × 3 =
15
2
 × 15 +
15
2
 × 3
    The equation is reduced to :
      x + x ÷ (15 − 3) × 15 + x ÷ (15 − 3) × 3 =
225
2
 +
45
2
    The equation is reduced to :
      x + x ÷ (15 − 3) × 15 + x ÷ (15 − 3) × 3 = 135
     Multiply both sides of the equation by:(15 − 3)
      x (15 − 3) + x × 15 + x ÷ (15 − 3) × 3(15 − 3) = 135(15 − 3)
    Remove a bracket on the left of the equation:
      x × 15 − x × 3 + x × 15 + x ÷ (15 − 3) × 3(15 − 3) = 135(15 − 3)
    Remove a bracket on the right of the equation:：
      x × 15 − x × 3 + x × 15 + x ÷ (15 − 3) × 3(15 − 3) = 135 × 15 − 135 × 3
    The equation is reduced to :
      x × 15 − x × 3 + x × 15 + x ÷ (15 − 3) × 3(15 − 3) = 2025 − 405
    The equation is reduced to :
     27 x + x ÷ (15 − 3) × 3(15 − 3) = 1620
     Multiply both sides of the equation by:(15 − 3)
     27 x (15 − 3) + x × 3(15 − 3) = 1620(15 − 3)
    Remove a bracket on the left of the equation:
     27 x × 15 − 27 x × 3 + x × 3(15 − 3) = 1620(15 − 3)
    Remove a bracket on the right of the equation:：
     27 x × 15 − 27 x × 3 + x × 3(15 − 3) = 1620 × 15 − 1620 × 3
    The equation is reduced to :
     405 x − 81 x + x × 3(15 − 3) = 24300 − 4860
    The equation is reduced to :
     324 x + x × 3(15 − 3) = 19440
    Remove a bracket on the left of the equation:
     324 x + x × 3 × 15 − x × 3 × 3 = 19440
    The equation is reduced to :
     324 x + x × 45 − x × 9 = 19440
    The equation is reduced to :
     360 x = 19440

    The coefficient of the unknown number is reduced to 1 :
      x = 19440 ÷ 360
        = 19440 ×
1
360
        = 54 × 1

    We obtained :
      x = 54
    This is the solution of the equation.



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