What is the solution of the equation 1.3x+2.6=7.8 x=
方程1.3x+2.6=7.8的解是x=多少
<gadget id="calculator">7.8 - 2.6</gadget>
<output>5.2</output>

<gadget id="calculator">5.2 / 1.3</gadget>
<output>4</output>

<result>4</result>