exam Maths Puzzle Numerical Ability

Please help me solve this one, I have worked on it for some time and cannot figure it out.

2x/9-5x/4=7/36

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exam Other Question

Can you please help me with this question.
The problem is 5^x-2=4^x-1. The answer I came up with is log4 but that doesnt seem right can you help? Thanks
Two cars leave town going opposite directions. One car is traveling 55 mph, and the other is traveling 65 mph How long will it take before they are 180 miles apart? Hint: The time