посчитайте 27:x=9:1111:15=6x:30

x = 33

27:x=9:11

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27=911

frac{27}{x}=frac{9}{11}x27=119

⋅27=⋅91 -

⋅27=⋅911

x cdot frac{27}{x}=x cdot frac{9}{11}x⋅x27=x⋅119

27=⋅911

7=⋅911

27=x cdot {color{#c92786}{frac{9}{11}}}27=x⋅119

27=911

7=911

27=frac{9}{11}x27=119x

27=911

7=911

27=frac{9x}{11}27=119x

11⋅27=11⋅911