用代入法解方程组(1){a=2b+3 (2){x-y=13 (3){x-y=4 (4){5x-y=110 {a=3b+20 {x=6y-7 {4x+2y=-1 {9y-x=110回答~最好也说明理由~如何运用?(1){a=2b+3 (2){x-y=13 (3){x-y=4 (4){5x-y=110 (1){a=3b+20 (2){x=6y-7 (3){4x+2y=-1 (4){9y-x=110回答~最
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![用代入法解方程组(1){a=2b+3 (2){x-y=13 (3){x-y=4 (4){5x-y=110 {a=3b+20 {x=6y-7 {4x+2y=-1 {9y-x=110回答~最好也说明理由~如何运用?(1){a=2b+3 (2){x-y=13 (3){x-y=4 (4){5x-y=110 (1){a=3b+20 (2){x=6y-7 (3){4x+2y=-1 (4){9y-x=110回答~最](/uploads/image/z/1723101-69-1.jpg?t=%E7%94%A8%E4%BB%A3%E5%85%A5%E6%B3%95%E8%A7%A3%E6%96%B9%E7%A8%8B%E7%BB%84%281%29%7Ba%3D2b%2B3+%282%29%7Bx-y%3D13+%283%29%7Bx-y%3D4+%284%29%7B5x-y%3D110+%7Ba%3D3b%2B20+%7Bx%3D6y-7+%7B4x%2B2y%3D-1+%7B9y-x%3D110%E5%9B%9E%E7%AD%94%7E%E6%9C%80%E5%A5%BD%E4%B9%9F%E8%AF%B4%E6%98%8E%E7%90%86%E7%94%B1%7E%E5%A6%82%E4%BD%95%E8%BF%90%E7%94%A8%3F%281%29%7Ba%3D2b%2B3+%282%29%7Bx-y%3D13+%283%29%7Bx-y%3D4+%284%29%7B5x-y%3D110+%281%29%7Ba%3D3b%2B20+%282%29%7Bx%3D6y-7+%283%29%7B4x%2B2y%3D-1+%284%29%7B9y-x%3D110%E5%9B%9E%E7%AD%94%7E%E6%9C%80)
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用代入法解方程组(1){a=2b+3 (2){x-y=13 (3){x-y=4 (4){5x-y=110 {a=3b+20 {x=6y-7 {4x+2y=-1 {9y-x=110回答~最好也说明理由~如何运用?(1){a=2b+3 (2){x-y=13 (3){x-y=4 (4){5x-y=110 (1){a=3b+20 (2){x=6y-7 (3){4x+2y=-1 (4){9y-x=110回答~最
用代入法解方程组
(1){a=2b+3 (2){x-y=13 (3){x-y=4 (4){5x-y=110
{a=3b+20 {x=6y-7 {4x+2y=-1 {9y-x=110
回答~最好也说明理由~
如何运用?
(1){a=2b+3 (2){x-y=13 (3){x-y=4 (4){5x-y=110
(1){a=3b+20 (2){x=6y-7 (3){4x+2y=-1 (4){9y-x=110
回答~最好也说明理由~
如何运用?
用代入法解方程组(1){a=2b+3 (2){x-y=13 (3){x-y=4 (4){5x-y=110 {a=3b+20 {x=6y-7 {4x+2y=-1 {9y-x=110回答~最好也说明理由~如何运用?(1){a=2b+3 (2){x-y=13 (3){x-y=4 (4){5x-y=110 (1){a=3b+20 (2){x=6y-7 (3){4x+2y=-1 (4){9y-x=110回答~最
举个例子吧
如第一题
把a=2b+3代入到下式有:
2b+3=3b+20,解得b=-17,
在代回上式,有a=-31.
底下的题目依次照做.
用代入法2a+b=3,3a+b=4,解方程组
方程组 a=2b+3 a=3b+20 用代入法解
a=2b+3 (1) a=3b+20 (2)用代入法解方程组
用代入法解下列方程组 {a=2b+3 a=3b+20
用代入消元法解方程组3a+2b=5 2a-b=1
方程组a=2b+3 a=3b+20怎么用代入法解怎么解哦
a=2b+3 a=3b+20 这是二元一次方程组,用代入法解
二元一次方程组a=2b+3,a=3b+20用代入法;怎样解
用代入法解下列方程组 2a+3b=2和4a-9b=-1
解方程组{a-3b/4+a+2b/2=1 {5(a-3b)-4(a+2b)=20用代入消元方法,
用代入法解方程.(用由什么得什么,把什么代入什么得什么的格式) 已知方程组2x-y用代入法解方程.(用由什么得什么,把什么代入什么得什么的格式) 已知方程组2x-y=2a+b和x+2y=a-b的解是x=1,y=3,求a,b
用代入法解下列方程组{2a+3b=2 3a-2b=3
用代入法解下列方程组【过程】2A+B=3 4A-3B=5
用代入法解下列方程组2a-b=8,3a+2b=5二元一次方程
用代入法解下列方程组{5a+5b-15=0;{3a+8b-1=0
用代入法解方程组2x+3y=12,3x-4y=17代入法代入法代入法!
3a-5b=7 12a-2b=-2.5 解这个方程组用二元一次方程的最初的代入法
二元一次方程组:用代入法解方程组:y=2x-5;x+3y=-1