exam Maths Puzzle Numerical Ability

at what point do the lines 5x+y=19 and -x+2y=-6 intersect I tried and got the answer (4,-1)

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exam Other Question

Graph the following polynomials by using the zero product property and end behavior.

y= -(x+5)(x-3)(x-6)
y= (x+4)^2(x-1)(x-3) The sum of two mubers is 36. Their difference is 12. What are the two numbers?