Sister 45831

Eva has a sister who is four years older. Ten years ago, she was twice as old as Eva. How old is Eva now?

Correct answer:

e =  14

Step-by-step explanation:

4+e=s 2 (e10)=s10  es=4 2es=10  Pivot:Row1Row2 2es=10 es=4  Row221 Row1Row2 2es=10 0.5s=9  s=0.59=18 e=210+s=210+18=14  e=14 s=18

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