Subtract 2.2 from both sides leaving -2n on the left and 10 on the right. from there you want to get "n" by itself so you divide both sides by -2n and you get n=-5
6+5=11+5=16+5=21 3+6=9+6=15+6=21 It will take Marco and Sophie 3 hours to get the same amount of money. The amount of money they will have will be $21.