解方程:(1)4x-3(20-x)+4=0(2)y+24−2y−36=1
解方程(3x+2y)/4=x+1/3y=3(x-2)+y
(x+y)-(x+y)平方 因式分解 解方程 2x²=3x (3x-1)² - 4=0 5x-15x
用代入法解方程2(x-y)/3-(x+y)/4=-1① 6(x+y)-4(2x-y)=16②
已知实数x,y满足方程x^2+y^2-4x+1=0,(1)求,Y/x的最大值和最小值 (2)求y-x
解方程:(1)4x+7y=10 (2)x+y-z=0 6x-11y+28=0 x+2y-z=3 2x-3y+2z=5
解方程(3x+2y)/4=(2x+3y)/5=(x-1)/6
用代入方程解x和y的值(x-1)/4-2y+3=0,3-x/3=(y+3)/6急需!
若|x+2y-1|+y²+4y+4=0,求(2x-y)²-2(2x-y)(x+2y)+(x+2y)&
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)x^2+2xy+y^2-4x-4y=5,x^2-2xy+y^2-2x+2y=3 (2) xy+x+y=34,
解方程3(x-1)-4y=8,2(y-3)=2(x+1)-14 已知(x-y)/4=(2x+y)/5,且2x-3y=18
用代入消元法解下列方程 1.y-x=-8,x+3y+4=0 2.3x=4y,4x-5y=2 3.2(x-1)=y+1,5