A year ago

A year ago, Jano was twice as old as Helen. In five years, Jano will be half as old as Helen. How old is Helen?

Final Answer:

L =  7

Step-by-step explanation:

J−1=2⋅ (L−1) J+5=(L+5)+(L+5)/2  J−2L=−1 2J−3L=5  Pivot:Row1↔Row2  Row2−21​⋅ Row1→Row2 −0.5L=−3.5  L=−0.5−3.5​=7 J=25+3L​=25+3⋅ 7​=13  J=13 L=7

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