exam Maths Puzzle Numerical Ability

Could someone help me on this problem?

I need to graph the inequality

3x + y <= 5
Can you also show the graph since I don't have the software to do it with and I have

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exam Other Question

At a recreation and sports facility, 3 members and 3 nonmembers pay a total of $180 to take an aerobics class. A group of 5 members and 3 nonmembers pay $210 to take the same class. How much does it cost members and nonmembers to take the aerobics class? one number is four times another number.the larger number is also 87 more than the smaller number.what are the numbers?