exam Maths Puzzle Numerical Ability

Solve the system by graphing.
2x + y = 4
x + y = 3
Please help

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exam Other Question

compute

{{{(1-1^2/100)*(1-2^2/100)*(1-3^2/100)*....*(1-2005^2)*(1-2006^2)}}}
How do you solve this inequality.