Question 386486
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Hi
Ericka is twice as old as her sister and half as old as her mother
Let x, x/2 and x/4 represent the mother's, ericka's and her sister ages.
Write as we read***
 (x/4 + 22) = 1/2(x+22)
 Solving for x
 x/4 + 22 = 1/2x + 11
       11 = x/4
        x = 44, the mother's age now, ericka is 22 and her sister 11

CHECKING our Anwer***
   11 + 22 = 33  = (44+22)/2