Question

8,3+2(a-1,5); 7,4(a+b)+0,5(a-b);

Answer 1

8,3+2(a-1,5) =8,3+2а-3= 5,3+2а
7,4(a+b)+0,5(a-b)=7,4а+7,4b+0,5а-0,5b=7,9а+6,9b