1.解下列方程組:(要寫過程)
1.解下列方程組:(要寫過程)
(1)5x-6y+1=0
7x+8y-15=0;
(2)3x+2y+1=0
5x-3y-11=0;
(3)2x+y-8=0
x-2y+1=0;
(4)2x-3y+10=0
3x-4y-2=0.
(1)5x-6y+1=0
7x+8y-15=0;
(2)3x+2y+1=0
5x-3y-11=0;
(3)2x+y-8=0
x-2y+1=0;
(4)2x-3y+10=0
3x-4y-2=0.
其他人氣:237 ℃時(shí)間:2020-06-13 08:30:00
優(yōu)質(zhì)解答
1.5x-6y+1=0 (1)7x+8y-15=0; (2) (1)*4 + (2)*3 X=1將X代入(1) y=1所以,原方程組的解為.以下都為如此...(1) (2) 式2.(1)*3+(2)*2 x=1 y=-13.(1)*2+(2) x=3 y=24.(1)*3-(2)*2 x=46 y=34...
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