sandra is 18 years older than jason. in three years she will be three times as old as jason will be then. how old was sandra 2 years ago?
+12 In three years, Sandra will be 3x and Jason will be x. We also know that x+18=3x. Using these equations, x=9, and 3x=27. That means, in three years, Sandra will be 27. Two years ago, Sandra was 22 years old. Hope this helps! 
