Mom bought 3 kilograms of grapes and 5 kilograms of apples, and shared them for 49 yuan. Grapes are 8 yuan per kilogram. How much are apples per kilogram? (solution by equation)
妈妈买来了3千克葡萄和5千克苹果，共用去49元，葡萄每千克8元，苹果每千克多少元？(用方程解)
<gadget id="calculator">8 * 3</gadget>
<output>24</output>

<gadget id="calculator">49 - 24</gadget>
<output>25</output>

<gadget id="calculator">25 / 5</gadget>
<output>5</output>

<result>5</result>