5x-(30/7)=0.
5x-(30/7)=0．
<gadget id="calculator">30 / 7</gadget>
<output>30/7 = around 4.285714</output>

<gadget id="calculator">(30/7) + 0</gadget>
<output>30/7 = around 4.285714</output>

<gadget id="calculator">(30/7) / 5</gadget>
<output>6/7 = around 0.857143</output>

<result>6/7 = around 0.857143</result>