Question

A triangle has angles described as followed: the first angle is four more than seven times a number, another angle is four less than the first and the third angle is twice as large as the first. What are the sizes of each angle.
I got the first angle of the triangle but I am having trouble what the expression is for angle 2 and 3..
if the three angles are x,y,z, then

x = 7n+4
y = x-4
z = 2x

So, how did you get a value for x and not be able to come up with y and z? They have to add to 180 degrees.

By the way, what did you get for x?

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