exam Maths Puzzle Numerical Ability

please help me solve this is what I got 5x-3y=13
4x-3y=11 My answer is x=3 and y =1 I do not think this is correct. please help.

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exam Other Question

What is the value of k if one root of (3k+1)x^2-2kx=-5 is 1? hi! i have an assignment, due tomorrow but i still havent finished two problems. it says:
for each of the following transformations represent using a mapping (x,y)--->>(1/cx + h,