3 years ago

Please answer correctly !!!!!!! Will mark brainliest !!!!!!!!!!

Mathematics

1 answer:

astra-53 [7]3 years ago

6 0

Answer:

9 years.

Step-by-step explanation:

Make x the number of years passed.

$\frac{39+x}{3+x}=4$

12 + 4x = 39 + x

27 = 3x

x = 9

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