exam Maths Puzzle Numerical Ability

4x-5y=-18
5x+4=-2

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exam Other Question

graph f(x) (x-5) / (x^2-16)

solve the inequality f(x) > 0
I am doing school from home. The name of my school is penn foster.

Reduce fraction 6x/12x to lowest terms.
My answer was 1/2 but was not right.