初一题:去括号且合并含有相同字母的项:【1】3+(2x-y)-(y-x)= 【2】2x-5a-(7x-2a)= 【3】a-2(a+b)+3(a-4【1】3+(2x-y)-(y-x)= 【2】2x-5a-(7x-2a)= 【3】a-2(a+b)+3(a-4b)=【4】x+2(3-π)-3(4x-1)=【5】2x-(5a-7x-2a)=【6
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![初一题:去括号且合并含有相同字母的项:【1】3+(2x-y)-(y-x)= 【2】2x-5a-(7x-2a)= 【3】a-2(a+b)+3(a-4【1】3+(2x-y)-(y-x)= 【2】2x-5a-(7x-2a)= 【3】a-2(a+b)+3(a-4b)=【4】x+2(3-π)-3(4x-1)=【5】2x-(5a-7x-2a)=【6](/uploads/image/z/5907396-12-6.jpg?t=%E5%88%9D%E4%B8%80%E9%A2%98%EF%BC%9A%E5%8E%BB%E6%8B%AC%E5%8F%B7%E4%B8%94%E5%90%88%E5%B9%B6%E5%90%AB%E6%9C%89%E7%9B%B8%E5%90%8C%E5%AD%97%E6%AF%8D%E7%9A%84%E9%A1%B9%EF%BC%9A%E3%80%901%E3%80%913%2B%282x-y%29-%28y-x%29%3D+%E3%80%902%E3%80%912x-5a-%287x-2a%29%3D+%E3%80%903%E3%80%91a-2%28a%2Bb%29%2B3%28a-4%E3%80%901%E3%80%913%2B%282x-y%29-%28y-x%29%3D+%E3%80%902%E3%80%912x-5a-%287x-2a%29%3D+%E3%80%903%E3%80%91a-2%28a%2Bb%29%2B3%28a-4b%29%3D%E3%80%904%E3%80%91x%2B2%283-%CF%80%29-3%EF%BC%884x-1%EF%BC%89%3D%E3%80%905%E3%80%912x-%EF%BC%885a-7x-2a%EF%BC%89%3D%E3%80%906)
初一题:去括号且合并含有相同字母的项:【1】3+(2x-y)-(y-x)= 【2】2x-5a-(7x-2a)= 【3】a-2(a+b)+3(a-4【1】3+(2x-y)-(y-x)= 【2】2x-5a-(7x-2a)= 【3】a-2(a+b)+3(a-4b)=【4】x+2(3-π)-3(4x-1)=【5】2x-(5a-7x-2a)=【6
初一题:去括号且合并含有相同字母的项:【1】3+(2x-y)-(y-x)= 【2】2x-5a-(7x-2a)= 【3】a-2(a+b)+3(a-4
【1】3+(2x-y)-(y-x)=
【2】2x-5a-(7x-2a)=
【3】a-2(a+b)+3(a-4b)=
【4】x+2(3-π)-3(4x-1)=
【5】2x-(5a-7x-2a)=
【6】2(x-3)-(-x+4)=
初一题:去括号且合并含有相同字母的项:【1】3+(2x-y)-(y-x)= 【2】2x-5a-(7x-2a)= 【3】a-2(a+b)+3(a-4【1】3+(2x-y)-(y-x)= 【2】2x-5a-(7x-2a)= 【3】a-2(a+b)+3(a-4b)=【4】x+2(3-π)-3(4x-1)=【5】2x-(5a-7x-2a)=【6
【1】3+(2x-y)-(y-x)
=3-2x-y-y+x
=3-x-2y;
【2】2x-5a-(7x-2a)
=2x-5a-7x+2a
=-5x-3a;
【3】a-2(a+b)+3(a-4b)
=a-2a-2b+3a-12b
=2a-14b;
【4】x+2(3-π)-3(4x-1)
=x+6-2π-12x+3
=-11x-2π+9;
【5】2x-(5a-7x-2a)
=2x-5a+7x+2a
=9x-3a;
【6】2(x-3)-(-x+4)
=2x-6+x-4
=3x-10;
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