exam Maths Puzzle Numerical Ability

solve for y: x=y-2
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3

thank you for your help this problem is not from my book its a hand out

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exam Other Question

the product of two numbers is 2. The sum of one number the reciprocal of the other is 6. Find the number? Use Cramer's rule to determine if the system is inconsistent system or contains dependent equations
4 x + y = 12

16x + 4y = 48