方程组:x+y=18,(1+12%)x+(1+10)y=2O

解方程组:(x+3)(y-2)=(x-3)(y+10),(x+1)(y+3)=(x-2)(y+12) 解方程组x-2y=o,3x+2y=8和y=2x-1,4x-3y=1 10/x+y+3/x-y=-5 15/x+y-2/x-y=-1（用换元法解此方程组） 解方程组,√(x+1/y)+√(x-y-2)=4 2x-y+1/y=10 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｛ 3x-4y(x-y)=3 { 2x-3y=1 已知方程组4x+2y=1,20x+8y,求x,y 解方程组：（0.2x+0.1y）/2- （4x-y）/10=（x-y）/5+ (3x+0.5y)/30 (3x+2y-1 解方程组：解方程组：｜X+Y｜=1｜X｜+2｜Y｜=3 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{(x-2)(y+3)=(x+1)(y-1) {(x+1)(y+1)=(x-1)(y+5)