Hi,

anna is now four times as old as her brother jong

Let x represent jong's age now and 4x Anna's age

Write as we Read***

4x + 4 = 2(x+4)

Solving for x

4x + 4 = 2x + 8

2x = 4

x = 2, Jong's age now, Anna is 8  (4*2)

checking our answer

8 + 4 = 2*6 = 12 

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