Ответ:
1)9*(x-11)=9x-99x
2)12*(6-y)=72-12y
3)2a*9*5b=90ab
4)17x-9x+2x=10x
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Ответ:
1)9*(x-11)=9x-99x
2)12*(6-y)=72-12y
3)2a*9*5b=90ab
4)17x-9x+2x=10x
72-12у
90аd
10х
……