In September, Xiaojun’s family spent 10% of their monthly income on water and electricity, and 50% on food. The two items totaled 1,800 yuan. How much is Xiaojun’s monthly income? (Solution of column equation)
小军家九月份水电费支出占月收入的10%，食品支出占月收入50%，两项共支出1800元，小军家月收入是多少元？(列方程解)
<gadget id="calculator">10 / 100</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">50 / 100</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">(1/10) + (1/2)</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">1_800 / (3/5)</gadget>
<output>3_000</output>

<result>3_000</result>