(1)4X+7Y=144 (2)12X-8Y=24

9y=3x-(x-1),4(x+y)-(2x+4)=8y 已知实数x.y满足根号(x+y-8)+根号(8-x-y)=根号(3x-y-4)+根号(x-2y+7),求x,y {3(x+y)-4(x-y)=4 {x+y/2 + x-y/6=1 已知4x=9y求(1)x+y/y (2)y-x/2x y=-3x的平方+12x-3 y=4x的平方-24x+26 y=2x的平方+8x-6 y=1/2x的平方-2x-1 的二 4/X+1/Y=2,XY=-1,求代数式4Y-X/X-2Y/（x+2y-12Y²/x-2y)的值 2(x+y) 3x+3y=24 x+y/2x x y/2y= 1 [(x+2y)(x-2y)-(x-2y)^2+8y(x+y)]除以4x= 解方程组24/(x+y) +24/(x-y) = 7/3 ,8/(x+y) +18/(x-y) = 4/3 1 .{5X-2y=3 X+6y=7 2.{5x+4y=-3 2x-3y=8 3.{x+Y+Z=26 x-Y=1 2x- 解二元一次方程{5X-2y=3 X+6y=7 {5x+4y=-3 2x-3y=8 {x+Y+Z=26 x-Y=1 2x- 函数的值域(1)y=3x (2)y=8/x (3)y=-4x+5 (4)y=x^2-6x+7 同志们 ...