exam Maths Puzzle Numerical Ability

Would you please solve:

|8-7+2-4| - |3-6+2|

Thanks!

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exam Other Question

Are there any values of the variable a for which the expressions 2+a and 2a have the same value? Explain. I was wondering if someone could help me with his expression.

Factor and simplify, Express the answer without negative exponents.

3x(2x+5)^(-1/2) + 3(2x+5)^(1/2)

Th