book Maths Puzzle Numerical Ability

What is the solution to

((cuberoot 2) raised to the 2 -x) = 2 raised to the x^2

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book Other Question

Can you please help me solve this problem? I would greatly appreciate your help!

2x/5 + 27/10 + 4x/5
Thank you!
7y2 (4y4 + y3 + 7)