2(x+y)-3(x-y)=1
2x+2y-3x+3y=1
-x+5y=1
6(x+y)+(x-y)=51
7x+5y=61
8x=60
x=15/2
y=17/10
2(x+y)-3(x-y)=1 6(x+y)+(x-y)=51
2个回答
相关问题
-
2(x+y)-3(x-y)=1 6(x+y)+7(x-y)=51 解方程组
-
2(x+y)-3(x-y) =1 6(x+y)+7(x-y)=51大神们帮帮忙
-
(1)(x-2y)^6/(2y-x)^3 (2)(-x-y)^6/(x+y)^3 (3)(x-2y)^3*(x-2y)^
-
1 （-6x+y)(-6x-y) 2 （-6x+y)(6x-y) 3（-6x+y)(x-6y)
-
x+y/2+x-y/3=5/6;x=y/6-x-y/3=1/2
-
① X+Y=3 Y=2X-3 ② x+2y=9 y-3x=1 ③3/x+1=y 2（x+1)=6 ④ y-x=3 7x-
-
2(x-y)/3-(x+y)/4=-1 3(x+y)-2(x-y)=6
-
(x-2y)(x+y)-2x(-2x-3y)+6x(-x-y),其中x=-1,y=2
-
｛2x-5y=21,{2x+y=6 {x-3y=1 {y=-2x+3 y=-x; y=1/2x+1 5x-9y=-13
-
【4】(-2x+3y)(-2x-3y) 【5】(-1/4x-2y)(-1/4x+2y) 【6】x^2+(y-x)(y+x