2x+y+6/2=4x-3y+24/3=-6x-7y+78/4 哥哥姐姐帮帮忙这个怎么解!急急急,非常急~~~~
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2x+y+6/2=4x-3y+24/3=-6x-7y+78/4哥哥姐姐帮帮忙这个怎么解!急急急,非常急~~~~2x+y+6/2=4x-3y+24/3=-6x-7y+78/4哥哥姐姐帮帮忙这个怎么解!急
2x+y+6/2=4x-3y+24/3=-6x-7y+78/4 哥哥姐姐帮帮忙这个怎么解!急急急,非常急~~~~
2x+y+6/2=4x-3y+24/3=-6x-7y+78/4 哥哥姐姐帮帮忙这个怎么解!
急急急,非常急~~~~
2x+y+6/2=4x-3y+24/3=-6x-7y+78/4 哥哥姐姐帮帮忙这个怎么解!急急急,非常急~~~~
这个可以通分,可以十字相乘.
1、通分:三个式子都乘以分母的公倍数12
6*(2x+y+6)=4*(4x-3y+24)=3*(=-6x-7y+78)
然后再两个等式相等,获得方程组,在解方程组就可以了
2、十字相乘:左边两个式子十字相乘:3*(2x+y+6)=2*(4x-3y+24)
右边两个十字相乘:4*(4x-3y+24)=3*(=-6x-7y+78)
再解方程组,希望可以帮到你,加油.
十字相乘,即等号左边分子乘上等号右边分母,第一二项十字相乘整理;即6x+3y+18=8x-6y+48
移项合并同类项得:2x+9y+30=0
后两项用同样方法整理得:34x+9y-138=0
联立方程组解得x=21/4,y=-9/2
2x+y+6/2=4x-3y+24/3=-6x-7y+78/4
3(2x+y+6)=2(4x-3y+24) ==>6x+3y+18=8x-6y+48 2x-9y+30=0
2(2x+y+6)=-6x-7y+78 ==>4x+2y+12=-6x-7y+78 10x+9y-66=0
12x-36=0 x=3
y=36/9=4
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
(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
{3(x+y)-4(x-y)=4 {x+y/2 + x-y/6=1
x+y/2+ x-y/2=6 2(x+y)-3x+3y=24 求X Y
(x-y) (x-2y)+(x+2y) (x-3y)-2(x-3y) (x-4y)=
【2(x-y)^3-8(x-y)^2(x+y)+6y(x-y)^2】/2(x-y)^2=
解二元一次方程组:3(x+y)-4(x-y)=4,x+y/2+x-y/6+1x+y/2+x-y/6+1=1
x+y/2+x-y/6=5 2(x+y)-3(x-y)=-2
2(x+y)-3(x-y)=3 ,4(x+y)+3(x-y)=15
3(x+y)-2(x-y)=11 4(x+y)+3(x-y)=9
3(x+y)+2(x-y)=36 4(x+y)-5(x-y)=2
2(x+y)-3(x-y)=1 6(x+y)+(x-y)=51
6(x-y)-2(x+y)=14 3(x-y)+(x+y)=5
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