exam Maths Puzzle Numerical Ability

I HOPE U CAN HELP ME WITH THIS. WRITE AN EQUATION OF A LINE THAT SATISFIES THE GIVEN CONDITIONS. WRITE THE ANSWER IN SLOPE-INTERCEPT FORM.

THE LINE PASSES THROUGH THE POINTS (2,5) AND (8,-5)

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Here is the problem:

Find the solution to the following systems of equations:
3x-2y+4z=8
x-y-2z=5
4x-3y+2z=13
solve using the addition method,answer must be an ordered pair.
-2x=2y+5
6x+3y=3