exam Maths Puzzle Numerical Ability

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A garden area is 30 feet long and 20 feet wide. A path of uniform width is set around the edge. If the remaining garden area is 400 feet squared, what is the width of the path?

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exam Other Question

A line has the equation 2x-y=3
What is the equation of a line passing through the point (1,-2) that is parallel to this line.
Find the equation of a line passing through the poin 5th grade:

2x - y = 12

What does x = and y =