SOLUTION: Greg is 18 years older than his sister. In 6 years he will be twice as old as her. How are are both of them now

Question 808523: Greg is 18 years older than his sister. In 6 years he will be twice as old as her. How are are both of them now
Answer by TimothyLamb(4379) (Show Source): You can put this solution on YOUR website!
g = s + 18
g + 6 = 2(s + 6)
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g + 6 = 2s + 12
g = 2s + 6
s + 18 = 2s + 6
Answer:
s = 12
g = 30
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