方程组计算(1)2x+3y=16 ,x+4y=13(2)7x-2y=3 ,9x+2y=-19(3) 3(x+y)-2(x
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方程组计算
(1)2x+3y=16 ,x+4y=13
(2)7x-2y=3 ,9x+2y=-19
(3) 3(x+y)-2(x-y)=7 ,2(x+y)-(x-y)=3
(1)2x+3y=16 ,x+4y=13
(2)7x-2y=3 ,9x+2y=-19
(3) 3(x+y)-2(x-y)=7 ,2(x+y)-(x-y)=3
(1)2x+3y=16 ,x+4y=13
x=5,y=2
(2)7x-2y=3 ,9x+2y=-19
x=-1,y=-5
(3) 3(x+y)-2(x-y)=7 ,2(x+y)-(x-y)=3
x+y=-1,x-y=-5
x=-3,y=2
x=5,y=2
(2)7x-2y=3 ,9x+2y=-19
x=-1,y=-5
(3) 3(x+y)-2(x-y)=7 ,2(x+y)-(x-y)=3
x+y=-1,x-y=-5
x=-3,y=2
解方程组:2(x-y)/3-x+y/4=-1 ,6(x+y)-4(2x-y)=16
解方程组{ 3x-4y(x-y)=3 { 2x-3y=1
解方程组 10(x-y)=3(x+y)+15 6(x+y)=4(2x-y)+16
2(x+y)-3(x-y)=1 6(x+y)+7(x-y)=51 解方程组
解方程组﹛2(x+y)-3(x-y)=1 6(x+y)+7(x-y)=51
一道二元一次方程组!3(x+y)-4(x-y)=4,(x+y)/2+(x-y)/6=1
解二元一次方程组{3(x+y)-4(x-y)=4,x+y/2+x-y/6=1
解方程组3(x+y)-4(x-y)=4和(x+y)/2+(x-y)/6=1
解二元一次方程组{3(x+y)-(x-y)=4,x+y/2+x-y/6=1
10/x+y+3/x-y=-5 15/x+y-2/x-y=-1(用换元法解此方程组)
解二元一次方程组:3(x+y)-4(x-y)=4,x+y/2+x-y/6+1
解方程组: {3x+2y=13 3x-2y=5 {x-y/3=x+y/2+1 2x-5y=9