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第73页

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$\begin {aligned}解：\frac {1}{6}x &= \frac {1}{4}×\frac {2}{3}\\\frac {1}{6}x&=\frac {1}{6}\\x &=1\end {aligned}$

$\begin {aligned}解： 8x &= 15×3.2\\8x&=48\\x &=6\end {aligned}$

$\begin {aligned}解： \frac {9}{2}x&=10×0.8\\\frac {9}{2}x&=8\\x &=\frac {16}{9}\end {aligned}$

$\begin {aligned}解：6x&=\frac {3}{4}×9\\6x&=\frac {27}{4}\\x &=\frac {9}{8}\end {aligned}$

$\begin {aligned}解：\frac {1}{6}x &= \frac {4}{9}×15\\\frac {1}{6}x&=\frac {20}{3}\\x &=40\end {aligned}$

$\begin {aligned}解： 2x-2&=18×7\\2x-2&=126\\2x&=128\\x &=64\end {aligned}$

15%

300

$8$米$ = 800$厘米

$800×\frac {1}{200}=4($厘米$)$

$6$米$ = 600$厘米

$600×\frac {1}{200}=3($厘米$)$

$4×3 = 12($平方厘米$)$