exam Maths Puzzle Numerical Ability

x-5y=9

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How do I graph the solution set of x<-7??? Someone PLEASE HELP!! Thank You 2p-q=2
2p+3q=22

Equation 1 2p-q=2 Multiply by 3 so, 6p-3q=6
6p-3q = 6
2p+3q = 22
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8p = 28/8
p = 3/8?? looks wrong from here.