Ответ:
x:(15×2)=3
×=15×2=30
×=30×3
×=90
90:(15×2)=3
x:30=3
x=90
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Ответ:
x:(15×2)=3
×=15×2=30
×=30×3
×=90
90:(15×2)=3
x:(15×2)=3
x:30=3
×=30×3
x=90
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90:(15×2)=3