exam Maths Puzzle Numerical Ability

The sum of two numbers is 53 over 24 and the difference of the same two numbers is 13 over 24. What are the numbers?

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Please help i have tried to figure this out and I am at a loss. I think you start out by using foil...
Write answer in standard form . Assume k is a positive interger.

[(x-1)+5i][(x-1)-5i]
can someone help me? solve the system:
{ x+5y-z=4
{3x+4y+z=4
{ x- y+z=0
I do not understand these questions. thanks for the help.