exam Maths Puzzle Numerical Ability

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The sum of two numbers is 112. The second is 7 more than 4 times the first. What are the two numbers?

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exam Other Question

Find the iength and width or a rectanguler lot with a perimeter of 88 meters if the length is 4 meters more than the width. Graph each linear equation

2x+y=2

How do you find the RIGHT numbers to subsitute x and y with, how do you know what numbers to use?