exam Maths Puzzle Numerical Ability

Could you please help me solve this problem? It is:
tan2x = 1 - secx

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exam Other Question

Could you please solve by using sustitution method. Please show details.
Thank you.

x - y = 3
3x - 2y = 3

Also please tell if it is independent, inconsistent or dependent. PLEASE HELP ME!!!!!!1

Solve the sytem of inequalities by graphing. IF the system does not have a solution, write no solution.

x > 2 and y < or equal to x+3