解方程组:20%*x*y=12000 10%*x*(y+100)=12000+4000
一次方程组x=y+3 (10y+x)+(10x+y)=99 怎么解
解方程组x+y+√(x+y)=20;x²+y²=136
解方程组X+Y/2=3X-2Y=10+6X+Y/4
解方程组x+y=15 (x+15%x+y+10%y)=17
解方程组(x+y)(x-2y)=-5 (x-y)(x+2y)=7
用加减法解方程组:{(x+y)/6+(x-y)/10=3 (x+y)/6+(y-x)/10=-1
解方程组x+y/6+x-y/10=3,x+y/6+y-x/10=-1
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)+5/(x-y)=18 9/(x+y)-10/(y-x)=66
解方程组:2/(x+y)+5/(x-y)=18 9/(x+y)-10/(y-x)=66
解方程组 2x+y(y-2x)=9 (x+y)(x+y-3)=10
解方程组 10(x-y)=3(x+y)+15 6(x+y)=4(2x-y)+16