For all the numbers a and b, if the operation a*b is defined as a*b=ab-a+b, what is the solution of the equation 5*x=17?
对于所有的数a、b，把运算a*b定义为a*b=ab-a+b，则方程5*x=17的解是多少．
<gadget id="calculator">17 + 5</gadget>
<output>22</output>

<gadget id="calculator">22 / 6</gadget>
<output>11/3 = around 3.666667</output>

<result>11/3 = around 3.666667</result>