6x-3y=2 .1 (3x+y)(2x-y)=4 .2 解方程
用代入法解方程2(x-y)/3-(x+y)/4=-1① 6(x+y)-4(2x-y)=16②
解方程(3x+2y)/4=x+1/3y=3(x-2)+y
不解方程2x+y=6,x-3y=1,求7y(x-3y)^2-2(3y-x)^3 的值
{3(x+y)-4(x-y)=4 {x+y/2 + x-y/6=1
解方程(3x+2y)/4=(2x+3y)/5=(x-1)/6
解方程x+y+(x+y/2)=15 3x+5y+4(x+y/2)=62
解方程:3x+2y/4=2x+y/5=x-y+1/6要详细过程
解方程:(1)4x+7y=10 (2)x+y-z=0 6x-11y+28=0 x+2y-z=3 2x-3y+2z=5
(x+y)-(x+y)平方 因式分解 解方程 2x²=3x (3x-1)² - 4=0 5x-15x
解方程:3分之2(x-y)-4分之x+y=-1,3(x+y)-6(x-y)=6
解方程组:(0.2x+0.1y)/2- (4x-y)/10=(x-y)/5+ (3x+0.5y)/30 (3x+2y-1
x+y/2+x-y/3=6,4(x+y)-3(x-y)=-20