तापमान (40) से घटकर (40-3x) हो जाता है। यदि नया तापमान (25) से कम है, तो (x) के लिए समाधान क्या है?

The temperature decreases from (40) to (40-3x). If the new temperature is less than (25), what is the solution for (x)?

Explanation opens after your attempt
Correct Answer

D. (x>5)

Step 1

Concept

(40-3x<25) gives (-3x<-15), so (x>5). Do not forget to reverse the sign when dividing by a negative.

Step 2

Why this answer is correct

The correct answer is D. (x>5). (40-3x<25) gives (-3x<-15), so (x>5). Do not forget to reverse the sign when dividing by a negative.

Step 3

Exam Tip

(40-3x<25) से (-3x<-15), इसलिए (x>5)। परीक्षा में ऋणात्मक से भाग देने पर चिन्ह पलटना न भूलें।

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Mathematics Answer, Explanation and Revision Hints

तापमान (40) से घटकर (40-3x) हो जाता है। यदि नया तापमान (25) से कम है, तो (x) के लिए समाधान क्या है? / The temperature decreases from (40) to (40-3x). If the new temperature is less than (25), what is the solution for (x)?

Correct Answer: D. (x>5). Explanation: (40-3x<25) से (-3x<-15), इसलिए (x>5)। परीक्षा में ऋणात्मक से भाग देने पर चिन्ह पलटना न भूलें। / (40-3x<25) gives (-3x<-15), so (x>5). Do not forget to reverse the sign when dividing by a negative.

Which concept should I revise for this Mathematics MCQ?

(40-3x<25) gives (-3x<-15), so (x>5). Do not forget to reverse the sign when dividing by a negative.

What exam hint can help solve this Mathematics question?

(40-3x<25) से (-3x<-15), इसलिए (x>5)। परीक्षा में ऋणात्मक से भाग देने पर चिन्ह पलटना न भूलें।