It costs 13 yuan to buy 2 kilograms of oranges and 3 kilograms of bananas, and 22 yuan to buy the same 2 kilograms of oranges and 6 kilograms of bananas. How much is the total cost of buying 1 kilogram of oranges and 1 kilogram of bananas?
买2千克橘子和3千克香蕉共需要13元，买同样的2千克橘子和6千克香蕉需要22元，买1千克橘子和1千克香蕉共多少元．
<gadget id="calculator">22 - 13</gadget>
<output>9</output>

<gadget id="calculator">9 / 3</gadget>
<output>3</output>

<gadget id="calculator">13 - 9</gadget>
<output>4</output>

<gadget id="calculator">4 / 2</gadget>
<output>2</output>

<gadget id="calculator">3 + 2</gadget>
<output>5</output>

<result>5</result>