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

Solve by substitution,state whether it is independent,inconsistent,or dependent.;
x - y = 3
3x -2y = 3 At 10:00 a.m. planes leave an airport. If the northbound plane flies at 280 mph and the southbound at 320mph, at what time will they be 1,000 miles apart?