exam Maths Puzzle Numerical Ability

Please help me to solve this equation:
99wsquared+xcube-81xraised to the 4th power+63w/9wx

Thank you

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exam Other Question

a) How does correlation analysis differ from regression analysis?
Correlation analysis looks for a connection or interactions between 2 variables. Regression looks for trends in o

4x-2y=42 5x+3y=25