Question 1135159
Current age of Kris = x
Current age of Mario = x+4





Three years from now, 
Age of Kris = x+3
Age of Mario = x+4+3 = x+7

"She will be two thirds as old as Mario" means that:
{{{(x+3)=(2/3)(x+7)}}}
{{{x+3=2x/3+14/3}}}
{{{x/3=5/3}}}
{{{x=5}}}

Current age of Mario: x+4=5+4=9

Mario is 9 years old right now.




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