exam Maths Puzzle Numerical Ability

Hello! can you please help me how to make a word problem for this
equation: t + u = 7
10t + u + 9 = 10u + t

Please...this equation has only one word problem.

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exam Other Question

(ax/2b)-(c/3d)+x=1
solve for x
How do you find zeros and their multiplicities for f(x)= (x-4)(x+5)(x^2-9)?
Thank you.