Goran bought 6 CDs that were each the same price. Including sales tax, he paid a total of $78.60 . Each CD had a tax of $1.20 . What was the price of each CD before tax?

x = 82

y = 98

z = 87

Step-by-step explanation:

By inscribed angle theorem:

x° and y° are the measures of the opposite angles of a cyclic quadrilateral.

Opposite angles of a parallelogram are supplementary.

Therefore,

x° + y° = 180°

82° + y° = 180°

y° = 180° - 82°

y° = 98°

y = 98

Similarly,

93° + z° = 180°

z° = 180° - 93°

z° = 87°

z = 87