exam Maths Puzzle Numerical Ability

2^2x+2^x+2-12=0

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exam Other Question

What is the difference between an equiangular polygon, an equilateral polygon, and a regular polygon? Provide an example of each. simplify and reduce:
6/x-5-1/3x-15+4/5-x
I did it and got:
-5/(3)(-1)(x-5)