exam Maths Puzzle Numerical Ability

Perform operation and simplify. I need to know how to set this equation up and solve it.
x^2-6x+8/x^2-17x+70 . x^2-15x+56/x^2-15x+44

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exam Other Question

there are 12 trumpet players in the marching band, but there is only room for 3 of them in the jazz band. how many diffrent combinations of trumpet players could be selected for the jazz band out of the 12?
a. 1728
b. 36
c. 1320
d. 220
I need help with solving this rational equation

8x-7=7