{2x+3y=3 4x-y=13{:这是大括号两个式子一大括号相连的
来源:学生作业帮助网 编辑:作业帮 时间:2024/10/20 02:33:53
xJ@__&%$s$K} MQ"u!ܴ `}Ivs--Utng|g&LlQkf#Yߔ8g{+a㬇E^m^a)s=MGi#ɱ:,_rq'/S]32D%
JI6F_.tmznD[(d`j
`A#aP L?!HgmJrCTtRXr&]LGB[rz<-ۍ)QgO~z(7#
(x-y) (x-2y)+(x+2y) (x-3y)-2(x-3y) (x-4y)=
若x+y=4,则多项式1/2(x+y)+4(x-y)-3(x-y)-3/2(x+y)-x+y值是()
2x+4y=x+5y+5这是1式 3x+y=2+4y这是2式 求x.y
2x+4y=x+5y+5这是1式 3x+y=2+4y这是2式 求x.y
2(x+y)-3(x-y)=3 ,4(x+y)+3(x-y)=15
x+y/2+x-y/3=6,4(x+y)-3(x-y)=-20
{(x+y)/2+(x-y)/3=6 4(x+y)-3(x-y)=-20
4(x+y)-3(x-y)=-20,2/x+y+3/x-y=6
3(x+y)-2(x-y)=11 4(x+y)+3(x-y)=9
{3(x+y)-4(x-y)=4 {x+y/2 + x-y/6=1
3(x+y)+2(x-y)=36 4(x+y)-5(x-y)=2
(x+y)/2- x-y/2=6 3(x+y)=4(x-y)
x+y/3+x-y/2=6 4(x+y)-2(x-y)=40
4(x-y)-3(x-y)=9 5(x-y)+2(x-y)=11
3(x+y)-4(x-y)=11,2(x-y)+5(x+y)=27
先化简再求值(x-y)(x-2y)+(x-2y)(x-3y)-2(x-3y)(x-4y) x=4 y=5
已知x-2y/2x+3y=3/4,则x:y=x-2y是分子2x+3y是分母
已知2y-x=-3,求[4y(2x-y)-2x(2x-y)]/(2x-y