###Human: Emily has 6 marbles. Megan gives Emily double the number she has. Emily then gives Megan back half of her new total plus 1. How many marbles does Emily have now?, ### Assistant: Megan gives Emily 6*2=12 marbles.
Emily then has 6+12=18 marbles.
Emily gives Megan 18/2+1=10 marbles.
Emily has 18-10=8 marbles now. 
 So the answer is :  8