exam Maths Puzzle Numerical Ability

The sum of two munbers is 21. Three times the smaller number is two less than twice the larger number. Find the two numbers.

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exam Other Question

A man drives 600 miles to a convention. on the return trip he increases his speed by 10 mph and saves 2 hours driving time. how fast did he drive going to and from the convention?

Not from a textbook..a handed out assignment.
Find a vector that has the same direction as 3i - 7j and twice the magnitude.