It is known that 0.3x+8=20, so how much is 5x-90=.
已知0.3x+8=20，那么5x-90=多少．
<gadget id="calculator">20 - 8</gadget>
<output>12</output>

<gadget id="calculator">12 / 0.3</gadget>
<output>40</output>

<gadget id="calculator">5 * 40</gadget>
<output>200</output>

<gadget id="calculator">200 - 90</gadget>
<output>110</output>

<result>110</result>