Solve the equation: (1+40%)x=350; 60%x-12=6.
解方程：(1+40%)x=350；60%x-12=6．
<gadget id="calculator">6 + 12</gadget>
<output>18</output>

<gadget id="calculator">60 / 100</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">18 / (3/5)</gadget>
<output>30</output>

<result>30</result>