There are two numbers a and b, and it is known that a+b=6, b=8-(11/3), so what is the formula for finding a
有a，b两个数，已知a+b=6，b=8-(11/3)，那么求a的算式是多少
<gadget id="calculator">11 / 3</gadget>
<output>11/3 = around 3.666667</output>

<gadget id="calculator">8 - (11/3)</gadget>
<output>13/3 = around 4.333333</output>

<gadget id="calculator">6 - (13/3)</gadget>
<output>5/3 = around 1.666667</output>

<result>5/3 = around 1.666667</result>