book Maths Puzzle Numerical Ability

If I travel 3m per hour to the store and 5m per hour back home and the total traveling time was one hour, how far would I travel?

Here's what we did:
x/3 + x/5 = 1
15(x/3 +

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book Other Question

Graph the following inequality

4x + y is greater than or equal to 4

Thank you If they give you a problem that said dreaw on the number like that flooling set [-2,7) upside down U [5,10]
what does the u or upside down u mean