A barrel of soybean oil weighs 100 kilograms, and x kilograms are used up every day, and 79 kilograms are left after 6 days. The formula is: how many = 79.
一桶豆油重100千克，每天用去x千克，6天后还剩下79千克，用方程表示是：多少=79．
<gadget id="calculator">100 - 6</gadget>
<output>94</output>

<result>94</result>