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inn [45]
3 years ago
12

When i was 18 years old, my sister was half my age. Now I am 82 years. How old is my sister now?​

Mathematics
2 answers:
iVinArrow [24]3 years ago
4 0

Answer:

41 \:  \:  \: years \:  \:  \: old

Step-by-step explanation:

me \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \: sis \\ 18 \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \: 9 \\ 82 \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  x \\  \\ use \:  \: cross \: \\  multipaction \\ \\  18x = 82 \times 9 \\ 18x = 738 \\  \frac{18x}{18}  =  \frac{738}{18}  \\ x = 41

SVEN [57.7K]3 years ago
3 0

Answer:

<h2>41 y/o</h2><h2 />

Step-by-step explanation:

its a ratio and proportion:

<u>18 y/o  </u> =<u>   82 y/o    </u>    

9 y/o         x

82(9) = 18(x)

x = 738 / 18

x = 41 y/o

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