用加减消元法3x-2(x+2y)=3 11x+4x+8y=453x-2(x+2y)=311x+4(x+2y)=45算出这个方程组,不然不给分,
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/01 02:25:14
![用加减消元法3x-2(x+2y)=3 11x+4x+8y=453x-2(x+2y)=311x+4(x+2y)=45算出这个方程组,不然不给分,](/uploads/image/z/10413579-3-9.jpg?t=%E7%94%A8%E5%8A%A0%E5%87%8F%E6%B6%88%E5%85%83%E6%B3%953x-2%28x%2B2y%29%3D3+11x%2B4x%2B8y%3D453x-2%28x%2B2y%29%3D311x%2B4%28x%2B2y%29%3D45%E7%AE%97%E5%87%BA%E8%BF%99%E4%B8%AA%E6%96%B9%E7%A8%8B%E7%BB%84%2C%E4%B8%8D%E7%84%B6%E4%B8%8D%E7%BB%99%E5%88%86%2C)
用加减消元法3x-2(x+2y)=3 11x+4x+8y=453x-2(x+2y)=311x+4(x+2y)=45算出这个方程组,不然不给分,
用加减消元法3x-2(x+2y)=3 11x+4x+8y=45
3x-2(x+2y)=3
11x+4(x+2y)=45
算出这个方程组,不然不给分,
用加减消元法3x-2(x+2y)=3 11x+4x+8y=453x-2(x+2y)=311x+4(x+2y)=45算出这个方程组,不然不给分,
3x-2(x+2y)=3
3x-2x-4y=3
x-4y=3 同乘以2得
2x-8y=6..1
11x+4(x+2y)=45
15x+8y=45 ..2
两式相加得
17x=51
则x=3
则y=0
3x-2(x+2y)=3
x-4y=3 (1)
11x+4(x+2y)=45
15x+8y=15 (2)
(1)*2+(2)得
17x=51
x=3, y=0用代入消元法(详细过程) 2X-3Y=5 3X+2Y=122X-3Y=5
x=1.5y+2.5 (1)
3X+...
全部展开
3x-2(x+2y)=3
x-4y=3 (1)
11x+4(x+2y)=45
15x+8y=15 (2)
(1)*2+(2)得
17x=51
x=3, y=0
收起
{x-2y=9 {3x-2y=-1 (用加减消元法)
{2(x-y)=3(x+y) 2x+y=8 加减消元法
3x+2y=7 2x+3y=8[用加减消元法】
3x+2y=7 2x+3y=8用加减消元法.
x+3y=12 2x-3y=6用加减消元法
5x-3y=2,4y+2x=6用加减消元法
3x=5y 2x-3y=1加减消元法
{2x+y=1,5x+2y=3,加减消元法,求过程
5X+4Y=140,3X+2Y=76用加减消元法求解
3x+4y=7 4x+2y=1 加减消元法
解方程组{4x-y=1 2x-y=-3 加减消元法.
x+y=3 5x-2y=1 以加减消元法计算
用加减消元法解方程组3x-2y=1 2x+3y=-7
{x/3+y/4=1 x/3-y/2=1 用加减消元法解方程组
{x/2+y/3=1,x+y=3,用加减消元法解
用加减消元法解方程组 3(x-1)=y+5 2(y+1)=x+1
x/3+1=y 2(x+1)-y=6 用加减消元法算
{4x-3y=5,2y-4x=1用加减消元法解