exam Maths Puzzle Numerical Ability

I need the 2 part solution to this absolute value problem:

|-9x+8| = |5x+8|


Thank you

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exam Other Question

Consider the function g(x)=x^2/x+3 when
1. g(1/a), 1/g(a), g*sqrt a, sqrt g*a. Simplify all answers
Factor completely:

-25 + x to the second power