SOLUTION: In a certain triangle, angle A is seven times as large as angle B. Angle C is 30� more than angle A. How large is angle A?

Question 1070835: In a certain triangle, angle A is seven times as large as angle B. Angle C is 30� more than angle A. How large is angle A?
Answer by josgarithmetic(39613) (Show Source): You can put this solution on YOUR website!
angle A is seven times as large as angle B:
Angle C is 30 degrees more than angle A:
FACT About interior angles of a triangle: , measures in degrees
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System of equations for the problem description:

Question asks for the value of angle A.

First two equations can be expressed as formulas in terms of A.

SOLVE THIS for A ~~first~~.
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