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Inessa05 [86]
3 years ago
14

Robin's grandmother is 7 times older than him. In 12 years, she will be 3 times as old as him. How old is Robin?​

Mathematics
1 answer:
11111nata11111 [884]3 years ago
4 0

Answer:

6 year's old

Step-by-step explanation:

Grandma is G and Robin is R

G=7R

G+12=3(R+12)

G+12=3R+36

7R+12=3R+36

7R-3R=36-12

4R=24

R=6

Robin is 6 years old

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