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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.
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 2r+2+3.14r×1／4 = 57.12 .
Question type: Equation
Solution:Original question:
| 2 | r | + | 2 | + | 157 50 | r | × | 1 | ÷ | 4 | = | 1428 25 |
| Left side of the equation = | 2 | r | + | 2 | + | 157 200 | r |
| = | 557 200 | r | + | 2 |
557 200 | r | + | 2 | = | 1428 25 |
Transposition :
557 200 | r | = | 1428 25 | − | 2 |
Combine the items on the right of the equation:
557 200 | r | = | 1378 25 |
The coefficient of the unknown number is reduced to 1 :
| r | = | 1378 25 | ÷ | 557 200 |
| = | 1378 25 | × | 200 557 |
| = | 1378 | × | 8 557 |
We obtained :
| r | = | 11024 557 |
Convert the result to decimal form :
| r | = | 19.791741 |