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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 69.45 = (x/5)*0.7+64.9*0.3 .
Question type: Equation
Solution:Original question:
1389 20 | = | ( | x | ÷ | 5 | ) | × | 7 10 | + | 649 10 | × | 3 10 |
| Right side of the equation = | ( | x | ÷ | 5 | ) | × | 7 10 | + | 1947 100 |
1389 20 | = | ( | x | ÷ | 5 | ) | × | 7 10 | + | 1947 100 |
| Right side of the equation = | x | ÷ | 5 | × | 7 10 | + | 1947 100 |
| = | x | × | 7 50 | + | 1947 100 |
1389 20 | = | 7 50 | x | + | 1947 100 |
Transposition :
| - | 7 50 | x | = | 1947 100 | − | 1389 20 |
Combine the items on the right of the equation:
| - | 7 50 | x | = | - | 2499 50 |
By shifting the terms and changing the symbols on toth sides of the equation, we obtain :
2499 50 | = | 7 50 | 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 :
7 50 | x | = | 2499 50 |
The coefficient of the unknown number is reduced to 1 :
| x | = | 2499 50 | ÷ | 7 50 |
| = | 2499 50 | × | 50 7 |
| = | 357 | × | 1 |
We obtained :
| x | = | 357 |