exam Maths Puzzle Numerical Ability

I am not sure I have worked this problem correctly could you please help?

Solve the system by addition...

-2x + 3y = -15
x - 2y = 11

Thank you for your help.

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exam Other Question

In your day to day life think about relationships between varibles.

1. Choose a relationship between two varibles that you think is linear.

Pick 5 or 6 real life data point At 10:30A.M. two planes leave Houston one flying east at 560km/h and the other flying west at 640 km/h at what time will they be 2100 km apart