exam Maths Puzzle Numerical Ability

How would you solve the following equation?

3x-5(3x-7) = 2(x+9)+45

Thank you for your help

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exam Other Question

6x^3+2x^2-4x+2/3x-1 (5/x+6)-(3/x-6)

The denominators are the same but how do you change their signs so you can subtract?