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