解方程租组: (1)9x+7y=39, 7x+9y=41 (2)3(x-3)+
解方程租组: (1)9x+7y=39, 7x+9y=41 (2)3(x-3)+
不解方程2x+y=6,x-3y=1,求7y(x-3y)^2-2(3y-x)^3 的值
解方程一;{x+y-z=6,x-3y+2z=1,3x+2y-z=-7.②{3x+4z=7,2x+3y+z=9,5x-9y
求方程(x+y)/(x^2-xy+y^2)=3/7的整数解
解方程(组):(1)3x−2y=9x−y=7
解方程组,1、x/2=y/3 3x-5y=9 2、 x-2y=-7 3(x-2)=1-y
解方程组 (1){2x-y=5,x-2y=1 (2){7x+3y=5,-5x+6y=-9
解方程:1){x-1=3(y-2)2(x-1)=5y-18; 2)2x+3y/4+2x-3y/3=7,2x+3y/3+2
解方程:(1)4x+7y=10 (2)x+y-z=0 6x-11y+28=0 x+2y-z=3 2x-3y+2z=5
(Y-2)/3=X(Y-4)/5=X(Y-6)/7=X(Y-8)/9=XY/11=X求Y和X是多少?方程.我没学过.我自
求下列方程的解:(1)7x=6x-4; (2)-5x=8-4x; (3)9y+2=6y-4; (4)0.5x=0.3x-
解方程(3x+2y)/4=x+1/3y=3(x-2)+y