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求未知数$x$。
$50x = 125×8$
解：
$6x = 24×5$
解：
$45×\frac{1}{2}=9x$
$1.5x = 4.5×25$
$3.2×7 = 8x$
$\frac{2}{7}x=\frac{6}{7}×\frac{1}{6}$
$7.5×1.2 = 1.5x$
$240×5^{2}=x×4^{2}$
$50x = 125×8$
解：
$6x = 24×5$
解：
$45×\frac{1}{2}=9x$
$1.5x = 4.5×25$
$3.2×7 = 8x$
$\frac{2}{7}x=\frac{6}{7}×\frac{1}{6}$
$7.5×1.2 = 1.5x$
$240×5^{2}=x×4^{2}$
答案：
x = 125×8÷50
x = 20@@x = 24×5÷6
x = 20@@x = 45×1/2×1/9
x = 2.5@@x = 4.5×25÷1.5
x = 75@@x = 3.2×7÷8
x = 2.8@@x = 6/7×1/6×7/2
x = 1/2@@x = 7.5×1.2÷1.5
x = 6@@x = 240×25÷16
x = 375
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