Trợ lý học tập AI - Câu trả lời này chỉ mang tính tham khảo
To solve the given math problem, we need to follow these steps:
1) Solve the equation a:
2) Solve the equation b:
3) Set up an equation for the distance from A to B and solve it.
Now let's solve each part step by step:
1) To solve the equation a:
We first simplify the left-hand side of the equation:
This simplifies to:
Since this is a contradiction, there is no solution for this equation.
So, for equation a, there is no solution.
2) To solve the equation b:
We first find a common denominator and then combine like terms:
Solving for x gives us:
So, for equation b, the solution is .
3) Now let's set up an equation for the distance from A to B. Let d be the original speed of the car. Then we have:
The time taken at normal speed = ,
The time taken at reduced speed = ,
And we know that they differ by 30 minutes or hour.
So we can set up an equation as follows:
Solving this equation will give us the distance from A to B. After solving this equation, we get:
The distance from A to B is approximately km (rounded to two decimal places).
Therefore, in conclusion, after solving all parts of the problem, we find that:
Solution for equation a: No solution
Solution for equation b:
The distance from A to B is approximately km.
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