exam Maths Puzzle Numerical Ability

SOLVE BY SUBSTITUTION METHOD AND DETERMINE WHETHER ITS A INDEPENDENT, DEPENDENT, OR INCONSISTENT

x-y=5
2x=2y+14

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exam Other Question

Solve log a (8x+5)=log a (4x+29). Thank you for any help you can provide. Some students simplify:
2x^2 - 32 / x-4 as 2x^2 - 32 / x-4 = 2x-8

Choose values of x to show this is not true. Then simplify it correctly.

May be someone could help me with thise problem.