book Maths Puzzle Numerical Ability

Al is 4 years younger than Ed.
Let x = Ed's age.

Then___________ = Al's age.

Question 2
The Lions played 76 ball games.
They won 3 times as many games as they lost.
How m

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book Other Question

Find an equation of the line through the point (4,5) and perpendicular to the line passing through the points (-1,3) and (2,9). When x number of units are sold, the price of each unit (in dollars) is given by p=-x/2 + 75. Find the unit price when the following quantities are sold. 2,7,9,11.