3 years ago

In 20 years charles will bevthree time as old as he is now. how old is he now?

1 answer:

7 0

Answer:

10

Explanation:

Make our unknown equal to x, in this case his current age.

In 20 years he will be three times as old as he is now, in other words:

x + 20 = 3x

Now solve the equation:

20 = 3x - x
20 = 2x
10 = x

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