3x-5y=6x+4乘y=-15 x+y=100y=2x+82x+3y=123x+4y=17.y=100-x 100-x
7个回答
1, x=2+5/3y
6y+5/3y^2=-15
(y+9/5)^2+144/25=0 无解
2,3x+8=100 x=92/3 y=208/3
3, y=2 x=3
相关问题
X+Y=100 4X=3Y
4x+3y=100 x^2+y^2=625
x+2y=3(x+y)+5 3x-4y=4(x+y)-15
- {5x-2y=3{x+6y=7- {x+2y=0{3x+4y-6=0- {x-y=5{2x=15-3y- {3x-2
x+y=200 100x:200y=3:4
解不等式①100x+100y≤1000.②80y≤100x.③x+2y=15
若x、y互为相反数,则x+2x+3x+...100x+100y+99y+98y+...+y
6x+5y+3z=100 x+y+z=30 求 x y
不解方程组2x-y=10 x+3y=1/100 求(2x-y)²-(2x-y)²(x-4y)的值
2X=3Y,4x-5y=2 -6x+5y=3,3x=4y 2x+3y=5,3x=y-9 3x=1-y,3x=2y-5