упростите выражение 7х - (2а-х)
7х - (2а-х)=7x-2a+x=8x-2a
7х-(2а-х)=7х-2а+х=8х-2а
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7х - (2а-х)=7x-2a+x=8x-2a
7х-(2а-х)=7х-2а+х=8х-2а