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1 vote
Liza is one year older than her sister.

In four years Liza will be three times older than she is now. How old is Liza's sister now?

User Lorenso
by
8.1k points

1 Answer

7 votes

Answer:

one-year old

Explanation:

Call Liza L, and her sister S

Liza is one year older.

So L = S + 1

in four years Liza will be three times older.

L + 4 = 3L

4 = 3L - L = 2L

L = 2.

L = S + 1

S = L - 1 = 2 - 1 = 1.

User Cutetare
by
8.1k points
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