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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 (1-(0.7x/(0.7x+100)))*2.5 = (1-(0.532x/(0.532x+100)))*2.075 .
    Question type: Equation
    Solution:Original question:
     (1(
7
10
x ÷ (
7
10
x + 100))) ×
5
2
= (1(
133
250
x ÷ (
133
250
x + 100))) ×
83
40
    Remove a bracket on the left of the equation::
     1 ×
5
2
(
7
10
x ÷ (
7
10
x + 100)) ×
5
2
= (1(
133
250
x ÷ (
133
250
x + 100))) ×
83
40
    Remove a bracket on the right of the equation::
     1 ×
5
2
(
7
10
x ÷ (
7
10
x + 100)) ×
5
2
= 1 ×
83
40
(
133
250
x ÷ (
133
250
x + 100)) ×
83
40
    The equation is reduced to :
     
5
2
(
7
10
x ÷ (
7
10
x + 100)) ×
5
2
=
83
40
(
133
250
x ÷ (
133
250
x + 100)) ×
83
40
    Remove a bracket on the left of the equation:
     
5
2
7
10
x ÷ (
7
10
x + 100) ×
5
2
=
83
40
(
133
250
x ÷ (
133
250
x + 100)) ×
83
40
    Remove a bracket on the right of the equation::
     
5
2
7
10
x ÷ (
7
10
x + 100) ×
5
2
=
83
40
133
250
x ÷ (
133
250
x + 100) ×
83
40
    The equation is reduced to :
     
5
2
7
4
x ÷ (
7
10
x + 100) =
83
40
11039
10000
x ÷ (
133
250
x + 100)
     Multiply both sides of the equation by:(
7
10
x + 100) ,  (
133
250
x + 100)
     
5
2
(
7
10
x + 100)(
133
250
x + 100)
7
4
x (
133
250
x + 100) =
83
40
(
7
10
x + 100)(
133
250
x + 100)
11039
10000
x (
7
10
x + 100)
    Remove a bracket on the left of the equation:
     
5
2
×
7
10
x (
133
250
x + 100) +
5
2
× 100(
133
250
x + 100)
7
4
x (
133
250
x + 100) =
83
40
(
7
10
x + 100)(
133
250
x + 100)
11039
10000
x (
7
10
x + 100)
    Remove a bracket on the right of the equation::
     
5
2
×
7
10
x (
133
250
x + 100) +
5
2
× 100(
133
250
x + 100)
7
4
x (
133
250
x + 100) =
83
40
×
7
10
x (
133
250
x + 100) +
83
40
× 100(
133
250
x + 100)
11039
10000
x (
7
10
x + 100)
    The equation is reduced to :
     
7
4
x (
133
250
x + 100) + 250(
133
250
x + 100)
7
4
x (
133
250
x + 100) =
581
400
x (
133
250
x + 100) +
415
2
(
133
250
x + 100)
11039
10000
x (
7
10
x + 100)
    Remove a bracket on the left of the equation:
     
7
4
x ×
133
250
x +
7
4
x × 100 + 250(
133
250
x + 100)
7
4
x (
133
250
x + 100) =
581
400
x (
133
250
x + 100) +
415
2
(
133
250
x + 100)
11039
10000
x (
7
10
x + 100)
    Remove a bracket on the right of the equation::
     
7
4
x ×
133
250
x +
7
4
x × 100 + 250(
133
250
x + 100)
7
4
x (
133
250
x + 100) =
581
400
x ×
133
250
x +
581
400
x × 100 +
415
2
(
133
250
x + 100)
11039
10000
x (
7
10
x + 100)
    The equation is reduced to :
     
931
1000
x x + 175 x + 250(
133
250
x + 100)
7
4
x (
133
250
x + 100) =
77273
100000
x x +
581
4
x +
415
2
(
133
250
x + 100)
11039
10000
x (
7
10
x + 100)
    Remove a bracket on the left of the equation:
     
931
1000
x x + 175 x + 250 ×
133
250
x + 250 × 100
7
4
x =
77273
100000
x x +
581
4
x +
415
2
(
133
250
x + 100)
11039
10000
x (
7
10
x + 100)
    Remove a bracket on the right of the equation::
     
931
1000
x x + 175 x + 250 ×
133
250
x + 250 × 100
7
4
x =
77273
100000
x x +
581
4
x +
415
2
×
133
250
x +
415
2
× 100
11039
10000
x
    The equation is reduced to :
     
931
1000
x x + 175 x + 133 x + 25000
7
4
x (
133
250
x + 100) =
77273
100000
x x +
581
4
x +
11039
100
x + 20750
11039
10000
x (
7
10
x + 100)
    The equation is reduced to :
     
931
1000
x x + 308 x + 25000
7
4
x (
133
250
x + 100) =
77273
100000
x x +
6391
25
x + 20750
11039
10000
x (
7
10
x + 100)
    Remove a bracket on the left of the equation:
     
931
1000
x x + 308 x + 25000
7
4
x ×
133
250
x
7
4
x =
77273
100000
x x +
6391
25
x + 20750
11039
10000
x (
7
10
x + 100)
    Remove a bracket on the right of the equation::
     
931
1000
x x + 308 x + 25000
7
4
x ×
133
250
x
7
4
x =
77273
100000
x x +
6391
25
x + 20750
11039
10000
x ×
7
10
x
11039
10000
x
    The equation is reduced to :
     
931
1000
x x + 308 x + 25000
931
1000
x x 175 x =
77273
100000
x x +
6391
25
x + 20750
77273
100000
x x
11039
100
x
    The equation is reduced to :
     
931
1000
x x + 133 x + 25000
931
1000
x x =
77273
100000
x x +
581
4
x + 20750
77273
100000
x x

    The solution of the equation:
        x1≈-187.969925 , keep 6 decimal places
        x2≈-142.857143 , keep 6 decimal places
    
    There are 2 solution(s).


解程的详细方法请参阅:《方程的解法》



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