解方程y/3-(x+1)/6=3,2(x-y/2)=3(x+y/18)
{3(x+y)-4(x-y)=4 {x+y/2 + x-y/6=1
解方程:x-x-1/2=2-x+2/3 y+6=y+2/2-y-5/3
解方程:3x+2y/4=2x+y/5=x-y+1/6要详细过程
解方程x+y+(x+y/2)=15 3x+5y+4(x+y/2)=62
【2(x-y)^3-8(x-y)^2(x+y)+6y(x-y)^2】/2(x-y)^2=
解方程y²-3x²+x+1=0,2x-y=1
解方程:3分之2(x-y)-4分之x+y=-1,3(x+y)-6(x-y)=6
用代入法解方程2(x-y)/3-(x+y)/4=-1① 6(x+y)-4(2x-y)=16②
不解方程2x+y=6,x-3y=1,求7y(x-3y)^2-2(3y-x)^3 的值
先化简再求值(x-y)(x+y)-(x-2y) 的完全平方+x(3x-5y)-(x-y)(x-2y),其中x=1/2 y
解方程{2x+3y-1=x+6 (1) {y-x-8=x+6 (2)
解方程组:2(x-y)/3-x+y/4=-1 ,6(x+y)-4(2x-y)=16