решите уравнения:
6/11 -это дробь .
1) 6/11:(-12/33)+7/10=...
2) 3+7/8:(-3/4)=...
3) 2целых 4/5 - 4целых 1/5*(1целая 5/6 -41/42)=...
4) 33-5х=15-8х=...
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