exam Maths Puzzle Numerical Ability

x + y + 2 = 0
x y - 8

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exam Other Question

Please help me with the following :

Find three consecutive even integers such that 6 times the first is 16 less than four times the sum of the second and third.

thank u
The vertices of a triange are (5,3) (5, -1) and (-1, -1) what would the fourth one be?