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Work: Find the solution of equation 500000/(x-50)(2x-100) = 0.00608 .
Question type: Equation
Solution:Original question:| | 500000 | ÷ | ( | x | − | 50 | ) | × | ( | 2 | x | − | 100 | ) | = | 19 3125 |
| Multiply both sides of the equation by: | ( | x | − | 50 | ) |
| | 500000 | ( | 2 | x | − | 100 | ) | = | 19 3125 | ( | x | − | 50 | ) |
Remove a bracket on the left of the equation::
| | 500000 | × | 2 | x | − | 500000 | × | 100 | = | 19 3125 | ( | x | − | 50 | ) |
Remove a bracket on the right of the equation::
| | 500000 | × | 2 | x | − | 500000 | × | 100 | = | 19 3125 | x | − | 19 3125 | × | 50 |
The equation is reduced to :
| | 1000000 | x | − | 50000000 | = | 19 3125 | x | − | 38 125 |
Transposition :
| | 1000000 | x | − | 19 3125 | x | = | - | 38 125 | + | 50000000 |
Combine the items on the left of the equation:
| | 3124999981 3125 | x | = | - | 38 125 | + | 50000000 |
Combine the items on the right of the equation:
| | 3124999981 3125 | x | = | 6249999962 125 |
The coefficient of the unknown number is reduced to 1 :
| | x | = | 6249999962 125 | ÷ | 3124999981 3125 |
| | = | 6249999962 125 | × | 3125 3124999981 |
We obtained :
However,when simplifying the equation, multiply both sides by ( | x | − | 50 | ) | , and when
, its value is 0. Therefore, the value of this unknown number is not the solution of the equation, and the input to the equation is incorrect.
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