5x+3y=27 3x+2y=17
来源:学生作业帮助网 编辑:六六作业网 时间:2024/10/06 09:20:32
5x+3y=273x+2y=175x+3y=273x+2y=175x+3y=273x+2y=175x+3y=27①3x+2y=17②2①-3②,得10X+6y-9X-6Y=54-51x=3③将③代入①
5x+3y=27 3x+2y=17
5x+3y=27 3x+2y=17
5x+3y=27 3x+2y=17
5x+3y=27 ①
3x+2y=17 ②
2①-3②,得
10X+6y-9X-6Y=54-51
x=3 ③
将③代入①,得
15+3y=27
3y=12
y=4
x=3,y=4
希望对你有所帮助!
X=3,Y=4
X=3.Y=4
1式两边×2-2式两边×3 得出 x=3 带入1式中得 y=4
5x+3y=27......1 5x*2+3y*2=27*2 10x+6y=54
3x+2y=17......2 3x*3+2y*3=17*3 9x+6y=51
10x+6y-9x-6y=54-51
x=3
5*3+3y=27
3y=27-15
y=4
解是:X=3,Y=4
X=3,Y=4
5x+3y=27 3x+2y=17
10x+6y=54 9x+6y=51
x=3 y=4
5x+3y=27 (1)
3x+2y=17(2)
(1)*2得:10x+6y=54(3)
(2)*3得:9x+6y=51(4)
(3)-(4)得:x=3
将x=3带入(1)得:15+3y=27,y=4
所以方程组的解为x=3,y=4
一个个神速啊。算了。我写过程:
5x+3y=27 一式
3x+2y=17 二式
一式×2: 10x+6y=54
二式×3: 9x+6y=51
一式减二式:x=3
代入原式可求得,y=4
所以,X=3,Y=4
3(x+y)-4(x-y)=11,2(x-y)+5(x+y)=27
已知x-y/x+y=3,求代数式5(x-y)/x+y-x+y/2(x-y)
(x+y-5)*(x+y-5)+(x-y+3)=0 x*x-y*y
已知:3x-5y=0,求x/y,x-y/y,x-y/x
x+y/2+x-y/6=5 2(x+y)-3(x-y)=-2
3(x+y)+2(x-y)=36 4(x+y)-5(x-y)=2
(x-y)/(x+y)=3求( 3x-2y-1)/(x+y-5)
4(x-y)-3(x-y)=9 5(x-y)+2(x-y)=11
6(x-y)-2(x+y)=14 3(x-y)+(x+y)=5
把(x-y)看作一个整体,化解:5(x-y)+2(x-y)-4(x-y)= 3(x-y)把(x-y)看作一个整体,化解:5(x-y)+2(x-y)-4(x-y)=3(x-y)²-4(x-y)+7(x-y)-6(x-y)²=
先化简再求值(x-y)(x-2y)+(x-2y)(x-3y)-2(x-3y)(x-4y) x=4 y=5
{(x+y)/2+(x-y)/3=1,(x+y)-5(x-y)=2.求x=?,y=?
换元法解方程组3/x+y+2/x-y=17/5 2/x+y-5/x-y=1
解方程组 {3(x+y)-4(x-y)=11 {2(x-y)+5(x+y)=27
解方程组 {3(x+y)-4(x-y)=11 {2(x-y)+5(x+y)=27全过程、快
初二上学期方程题 4x+y=5 5x+4y=63x-2y=1 2x+3y=13x-2y=7 7x+5y=32x+3y=17 2x-y=-4x+5y=6 2x+y=23x-6y=4 3x+2y=52x+y=73x-4y=53x+y=1x-2y=-1x+y=42x+3y=92x-3y=74x+5y=3x+y=20004x+6y=90003x+5y=113x-2y=42x+3y=215x-2y=5x+y=54x+3y=182x+3y=16x+4y=132x+3y=40x
(x+y)(x-y)+(x-y)平方-(x-y)(3x-y) 其中x=-2 y=3分之一
(x-y) (x-2y)+(x+2y) (x-3y)-2(x-3y) (x-4y)=