exam Maths Puzzle Numerical Ability

I need help graphing this system.
x-y is less than or equal to 3

x+2y is greater than or equal to 6

WHat method should I use?

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exam Other Question
3) Use the geometric sequence of numbers 1, 1/3, 1/9 , 1/27… to find the following:
a) What is r, the ratio between 2 consecutive terms?
Answer:
Show work in this space. i am unsure on how to work out this problem can you help please?

solve for x
2/3 e^4x=3 3/5

thank you!