a)-3.5*(3k-2)+2*(1.3k-1)=
б)5*(a-1.7)-2*(2.7-a)=
в)4*(x-1.7)-3*(1.5-x)=
г)-2.8*(2y-3)+3*(2.1y-1)=
Раскройте скобки и приведите подобные слагаемые
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