exam Maths Puzzle Numerical Ability

Show the steps that you would take to solve the following algebraically:
5- 2X-6= 10-2xX-6

b) What potential solution did you obtain? Explain why this is this not a solution.

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exam Other Question

How do I write the equation for the question below, and then how do I solve it.

Questions: One angle is 3 times another. If the two angles are complimentary, what are the angle measures?
Determine which two equations represent perpendicular lines?

(a) y = 4x � 8
(b) y = 1/4x + 8
(c) y = � 1/4x + 8
(d) y = 1/4x � 8

I am not coming up with any of the sulutions can you please help me out.