判断对错,并说明哪不对①-(x-6)=-x-6②3a-(5b-2c+1)=3a-5b+2c-1③x+3(y-w)=x+3y-w④x-2(-y+g)=x+2y+g

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判断对错,并说明哪不对①-(x-6)=-x-6②3a-(5b-2c+1)=3a-5b+2c-1③x+3(y-w)=x+3y-w④x-2(-y+g)=x+2y+g判断对错,并说明哪不对①-(x-6)=-

判断对错,并说明哪不对①-(x-6)=-x-6②3a-(5b-2c+1)=3a-5b+2c-1③x+3(y-w)=x+3y-w④x-2(-y+g)=x+2y+g
判断对错,并说明哪不对
①-(x-6)=-x-6
②3a-(5b-2c+1)=3a-5b+2c-1
③x+3(y-w)=x+3y-w
④x-2(-y+g)=x+2y+g

判断对错,并说明哪不对①-(x-6)=-x-6②3a-(5b-2c+1)=3a-5b+2c-1③x+3(y-w)=x+3y-w④x-2(-y+g)=x+2y+g
①-(x-6)=-x+6
②3a-(5b-2c+1)=3a-5b+2c-1(对)
③x+3(y-w)=x+3y-3w
④x-2(-y+g)=x+2y-2g