Question

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

Answer 1

Answer:

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

Step-by-step explanation:

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

Answer 2

Answer:

41 y/o

Step-by-step explanation:

its a ratio and proportion:

18 y/o   =   82 y/o        

9 y/o         x

82(9) = 18(x)

x = 738 / 18

x = 41 y/o