Заполните пропуски знаками + или - затем упростите выражение ...(x-y)+x=-x+y+x=
...7,3...(-a-7)=-7,3-a-7=
...(k-3)...(-x-k+0,3)=-k+3+x+k-0,3=
...8,5a...(x-0,5a)...(-4,5a+x)=8,5a-x+0,5a-4,5a+x=
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