A can finish a piece of work in 5 days. B can do it in 10 days. They work together for two days and then A goes away. In how many days will B finish the work? Choices
A) 4	B) 5	C) 6	D) 7	E) 8
2/5 + (2 + x)/10 = 1 =&gt; x = 4 days   4nswer: 4
<result>A</result>
A can finish a piece of work in 5 days. B can do it in 10 days. They work together for two days and then A goes away. In how many days will B finish the work?