6(x+y)-4(2x-y)=16与2(x-y)-(x+y)/4=-1的方程组解法
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6(x+y)-4(2x-y)=16与2(x-y)-(x+y)/4=-1的方程组解法6(x+y)-4(2x-y)=16与2(x-y)-(x+y)/4=-1的方程组解法6(x+y)-4(2x-y)=16与
6(x+y)-4(2x-y)=16与2(x-y)-(x+y)/4=-1的方程组解法
6(x+y)-4(2x-y)=16与2(x-y)-(x+y)/4=-1的方程组解法
6(x+y)-4(2x-y)=16与2(x-y)-(x+y)/4=-1的方程组解法
2(x-y)/3 - (x+y)/4=-1 (1)
6(x+y)-4(2x-y)=16 (2)
(1)方程两边同乘以12得
8(x-y)-3(x+y)=-12
合并同类项得
5x-11y+12=0 (3)
(2)合并同类项得
10y-2x-16=0 (4)
(3)*2+(4)*5得
28y-56=0
所以 y=2
把y=2代入(1)得
x=2
6(x+y)-4(2x-y)=16 (1)
2(x-y)/3 - (x+y)/4=-1 (2)
(1)两侧同时约去2得3(x+y)-2(2x-y)=8展开整理得:
5y-x=8 得x=5y-8 (3)
(2) 两侧同时乘以4并展开整理得7x-9y=-4 将(3)代入得
y=2,代入(3)x=2
两圆x^2+y^2-6x+16y=0与x^2+y^2+4x-8y-44=0的公切线条数
6(x+y)-4(2x-y)=16与2(x-y)-(x+y)/4=-1的方程组解法
(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/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/x-x+y/y-(x+y)(x-y)/y² y/x=2
解方程组 10(x-y)=3(x+y)+15 6(x+y)=4(2x-y)+1610(x-y)=3(x+y)+156(x+y)=4(2x-y)+16
解方程组 10(x-y)=3(x+y)+15 6(x+y)=4(2x-y)+1610(x-y)=3(x+y)+156(x+y)=4(2x-y)+16分开的。
2(x-y)/3-(x+y)/4=-1 (1) 6(x+y)-4(2x-y)=16 (2)
(2x-2y)/3-(x-y)=-1和6(x+y)-4(2x-y)=16
解方程组2(x-y)/3-x+y/4=-1 6(x-y)-4(2x-y)=16
解方程组:2(x-y)/3-x+y/4=-1 ,6(x+y)-4(2x-y)=16
2(X-Y)/3=(X+Y)/4 -1 6(X+Y)=4(2X-Y)+16解方程
6(x+y)=4(2x-y)+16,2(x-y)/3=x+y/4-1
2(x-y)/3—x+y/4=1 6(x+y)—4(2x-y)=16