book Maths Puzzle Numerical Ability

I need to solve A=M+N/2
36=16+N/2

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book Other Question

I am having trouble translating this word problem into an algebraic equation can you please help? thanks

Six more than twice a number is four times the difference between three and the number. What is the number?
Solve using the factoring method- place quation in standard form befor factoring

9x^2 + 4x + 1 = 10x

Not sure where to go with this one