exam Maths Puzzle Numerical Ability

Hello,

I need help writing and solving this inequality:

Forty less three times a number is no less than the number increased by 15.

Thank you

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exam Other Question

1. Solve the equation: logbase4(x-5) = 0.5 - logbase4(1-x).

i follow through with the problem and get four different answers but none of them check out when they are plugged into "X". If 3 is added to a number and this sum is doubled, the result is 2 more than the number. Find the number.