3z-5z
(7y-3z)-(8y-5z)=-y+2z
3个回答
相关问题
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-(7y-3z)-(8y-5z)计算!
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3x+4z=7 2x+3y+z=9 5x+9y+7z=8 2x+y+z=9 x+2y+z=8 x+y+2z=7 三元一次
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化简：（7y-3z）-（8y-5z）=______．
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2x-3y+4z=2 4x+y+7z=3 8x+2y+3z=-5
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解方程组3x+y+2z=8,x+y+z=5,2x+3y+4z=7
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x-5y-3z=0 y+z-3x=3 x+y+3z=14 y+4z=3 z+x-3y=5 2x+y+z=7 2x-z=1
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{7x+3y-5z=8 y:x:z=5:3:8
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方程组3x-y+2z=7 2x+y-4z=-8 7x+y-5z=-6怎么做?
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maths 2x+3y-z=11 2x+y-5z=8 -2x+7y+z=19 方程组
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三元一次方程2X+3y-z=11 2X+y-5z=8 -2X+7y+z=19