Zhang Li scored 80 points in Chinese in the final exam, 90 points in nature, 85 points in Sipin, and 6 points more than the average score of the four subjects in mathematics. How many points did Zhang Li score in mathematics? (solution with equation)
张丽期末考试语文得了80分，自然得了90分，思品得了85分，数学分数比四门功课的平均分多6分，张丽的数学得了多少分？(用方程解答)
<gadget id="calculator">80 / 4</gadget>
<output>20</output>

<gadget id="calculator">90 / 4</gadget>
<output>45/2 = around 22.5</output>

<gadget id="calculator">85 / 4</gadget>
<output>85/4 = around 21.25</output>

<gadget id="calculator">20 + (45/2) + (85/4) + 6</gadget>
<output>279/4 = around 69.75</output>

<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 - (1/4)</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">(279/4) / (3/4)</gadget>
<output>93</output>

<result>93</result>