解方程组 x+2y=1.5,12(x+y)+15y=20
解方程组 x+2y=1.5,12(x+y)+15y=20
解方程组(x+y)(x-2y)=-5 (x-y)(x+2y)=7
解方程组:{x+|3x-y|+3y=15 2x+y=6
解方程组:(x+3)(y-2)=(x-3)(y+10),(x+1)(y+3)=(x-2)(y+12)
解方程组:2(x+y)-3(x-y)=34(x+y)+3x=15+3y.
解方程组 10(x-y)=3(x+y)+15 6(x+y)=4(2x-y)+16
解方程组:x+y/2+x-y/3=6 4(x+y)-5(x-y)=12
方程组12/x+15/y=20 x=y-0.3怎么解
{x+y=100,20%x+12%y=100×15%,解方程组,
1/2x-2y=-74,x-6y=-12解方程组,x/5-y/2=2,2x+3y=4解方程组
解方程组x+y=15 (x+15%x+y+10%y)=17
解方程组 x+y+z=-7 x-y=12 x+y-z=6