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Anna [14]
4 years ago
12

10/9 = 9/y y= something What is the y?

Mathematics
2 answers:
Leto [7]4 years ago
6 0
\frac{10}{9} = \frac{9}{y} \ \ \ \ \ \ \ \ \ \ \ \ |\hbox{cross multiply} \\
10 \times y=9 \times 9 \\
10y=81 \ \ \ \ \ \ \ \ \ \ |\div 10 \\
y=\frac{81}{10} \\ \\
\boxed{y=\frac{81}{10}}
ikadub [295]4 years ago
3 0
10/9 = 9/y

Cross multiply

10*y=(9)*(9)

10y=81

Divide both sides by 10.

10y/10=81/10

y=81/10


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