方程组x-y=500① x+15%-(y-10%y)=950②
来源:学生作业帮助网 编辑:六六作业网 时间:2024/12/19 03:19:37
方程组x-y=500①x+15%-(y-10%y)=950②方程组x-y=500①x+15%-(y-10%y)=950②方程组x-y=500①x+15%-(y-10%y)=950②x-y=500①x+
方程组x-y=500① x+15%-(y-10%y)=950②
方程组x-y=500① x+15%-(y-10%y)=950②
方程组x-y=500① x+15%-(y-10%y)=950②
x-y=500①
x+15%-(y-10%y)=950②
由①得:0.85x-0.85y=425③
由②得:0.85x-0.9y=950④
③-④得:0.05y=-525
∴y=10500
将y=10500代入①得:x+10500=500
∴x=-10000
∴方程组的解为:
x=-10000
y=-10500
方程组x-y=500① x+15%-(y-10%y)=950②
分式方程组 {①1/(x+y)-1/(y-x)=8/15{②5/(x+y)-5/y=-4
解方程组:{x+|3x-y|+3y=15 2x+y=6解方程组:{x+|3x-y|+3y=15 ① { 2x+y=6 ②
解方程组x+y=15 (x+15%x+y+10%y)=17
方程组 5x+2y=25① 3x+4y=15②
解方程组①4X+3Y=3 ②3X-2Y=15
解方程组(x/2-y/5=4①,x/7-y/15=3②)
解方程组 X+Y=500 (1+15%)X-(1-10%)Y=950
已知方程组2x+3y=10,3x+2y=15,不解方程组则x+y=?
方程组:3(x+y)-a(x-y)=16,2(x+y)+b(x-y)=15的解是什么?
10/x+y+3/x-y=-5 15/x+y-2/x-y=-1(用换元法解此方程组)
2(x+y)-3(x-y)+=3 4(x+y)+3x=15+3y 换元法解方程组
解方程组:2(x +y)-3(x-y)=3;4(x+ y)+ 3(x-y)=15
3/(X-Y)+10/(X+Y)=-5 2/(X-Y)-15/(X+Y)=1 解分式方程组
解方程组 3(X+Y)-5(X-Y)=16…………① 2(x+y)+(X-Y)=15…………②
解方程组 3(X+Y)-5(X-Y)=16…………① 2(x+y)-(X-Y)=15…………②
解方程组(x+y)(x-2y)=-5 (x-y)(x+2y)=7
设实数x,y满足方程组①x-y-2=0 ③2y-3