exam Maths Puzzle Numerical Ability

I am so clueless when it comes to Algebra. How could i solve this?

y = -2x – 9


x y
-2
-1
0
1
2

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exam Other Question

Homework example. Please show me how to solve this complex fraction. Thanks!

(3/x-2)+(21/x^2-4)=(14/x+2)
Solve 1/x+1/6=1/4