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y =
An equilateral triangle A B C. Side A B is the base. Sides A B, B C, and A C are equal. Sides A B, B C, and A C are labeled with single tick marks. Angle B is labeled as left parenthesis 3 x minus 3 right parenthesis degrees, and angle C is labeled as left parenthesis 8 y minus 4 right parenthesis degrees.