{11x+4y=115 8x+5y=115
3(x+y)-4(x-y)=11,2(x-y)+5(x+y)=27
3x+2=y 5X+4=Y 7X+6=Y 9X+8=y 11x=y要如何计算
3x+2=y 5x+4=y 7x+6=y 9x+8=y 11x=y
y-3x=2,y-5x=4,y-7x=6,y-9x=8,y-11x=0方程组,
3x+2=y 5x+4=y 7x+6=y 9x+8=y 11x=y 联立方程 有的话
(4x-2y-z)-{5x[8y-2y-(x+y)]-x+(3y-10z)]=? kuai
9x+8y=-2,4x+5y=-11,y最后等于多少
(5x+3y)(3y-5x)-(4x-y)(4y+x)=
已知:4x = 5y,求(x+y) :y
解方程组 {3(x+y)-4(x-y)=11 {2(x-y)+5(x+y)=27全过程、快
解方程组 {3(x+y)-4(x-y)=11 {2(x-y)+5(x+y)=27
x-y+5x-4x= ?