3x-y+x=3 4【X-y-1】=3【1-y】-1 5x-4y+4x=3 2x+y-3x=11 【 x除以2 】-【y 除以3】 =2 2x+7y-3x=19 x+y+x=12 3x+2y-x=18
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![3x-y+x=3 4【X-y-1】=3【1-y】-1 5x-4y+4x=3 2x+y-3x=11 【 x除以2 】-【y 除以3】 =2 2x+7y-3x=19 x+y+x=12 3x+2y-x=18](/uploads/image/z/11486999-47-9.jpg?t=3x-y%2Bx%3D3+4%E3%80%90X-y-1%E3%80%91%3D3%E3%80%901-y%E3%80%91-1+5x-4y%2B4x%3D3+2x%2By-3x%3D11+%E3%80%90+x%E9%99%A4%E4%BB%A52+%E3%80%91-%E3%80%90y+%E9%99%A4%E4%BB%A53%E3%80%91+%3D2+2x%2B7y-3x%3D19+x%2By%2Bx%3D12+3x%2B2y-x%3D18)
3x-y+x=3 4【X-y-1】=3【1-y】-1 5x-4y+4x=3 2x+y-3x=11 【 x除以2 】-【y 除以3】 =2 2x+7y-3x=19 x+y+x=12 3x+2y-x=18
3x-y+x=3 4【X-y-1】=3【1-y】-1
5x-4y+4x=3 2x+y-3x=11 【 x除以2 】-【y 除以3】 =2 2x+7y-3x=19 x+y+x=12 3x+2y-x=18
3x-y+x=3 4【X-y-1】=3【1-y】-1 5x-4y+4x=3 2x+y-3x=11 【 x除以2 】-【y 除以3】 =2 2x+7y-3x=19 x+y+x=12 3x+2y-x=18
应该很好解,只是你这方程组没排列好,你在每个方程前加个序号吧,我帮你解.
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