Solve the equation: (150-x)/8=(150-3x)/4.
解方程：(150-x)/8=(150-3x)/4．
<gadget id="calculator">150 / 4</gadget>
<output>75/2 = around 37.5</output>

<gadget id="calculator">150 / 8</gadget>
<output>75/4 = around 18.75</output>

<gadget id="calculator">(75/2) - (75/4)</gadget>
<output>75/4 = around 18.75</output>

<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">1 / 8</gadget>
<output>1/8 = around 0.125</output>

<gadget id="calculator">(3/4) - (1/8)</gadget>
<output>5/8 = around 0.625</output>

<gadget id="calculator">(75/4) / (5/8)</gadget>
<output>30</output>

<result>30</result>