exam Maths Puzzle Numerical Ability

can you please help me graph: (((x+y<1)))

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exam Other Question

Ms K is 6 years more than 3 times as old as her daughter. 8 years ago she was 2 years less than 9 times as old as her daughter was then. What are thier ages? input output
36 9
72 9
24 1
18 0

need to determine the function for each output