SOLUTION: In a triangle ABC, angle B is 4 times angle A and angle C is 15 degrees less than 5 times angle A. Find the size of the angles.

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Question 346539: In a triangle ABC, angle B is 4 times angle A and angle C is 15 degrees less than 5 times angle A. Find the size of the angles.
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
For any triangle,
A%2BB%2BC=180
Substituting,
A%2B%284A%29%2B%285A-15%29=180
10A-15=180
Solve for A, then go back and solve for B and C.