The school newly purchased 48 sets of desks. The unit price of each set is x yuan. The total payment is 4000 yuan, and the return is 160 yuan. What is the unit price of each set of desks? (Solution of column equation)
学校新添置了48套课桌，每套单价是x元，共付4000元，找回160元，每套课桌的单价是多少元？(列方程解)
<gadget id="calculator">4_000 - 160</gadget>
<output>3_840</output>

<gadget id="calculator">3_840 / 48</gadget>
<output>80</output>

<result>80</result>