(x-15)/(y+15)=3/4,(x+17)/(y-17)=11/4
3(x+y)-4(x-y)=11,2(x-y)+5(x+y)=27
{3x-2y=3,2x+2y=17 {4x-2y=14,5x+y=7 {x+3y=6,2x-3y=3 {2x+3y=11
已知方程组{4x+3y=15,2x-y=17,那么(x+2y)^2010=
{4x+3y=15 {2x-y=17 ,那么(x+2y)的2006次方=?
已知x、y均为实数,且满足xy+x+y=17,x^2y+y^2x=66,求x^4+x^3y+x^2*y^2+y^3x+y
解方程x+y+(x+y/2)=15 3x+5y+4(x+y/2)=62
已知2x+2y=-8,4x+y=15求(x-y)^-(3x+2y)^
解方程组 10(x-y)=3(x+y)+15 6(x+y)=4(2x-y)+16
方程组的解4x-5y=17 4x-3y=15
2) 4x-9z=17 3x+y+15z=18 x+2y+3z=2 (3) 2x+4y+3z=9 3x-2y+5z=11
(1) 4x-9z=17 3x+y+15z=18 x+2y+3z=2 (2)2x+4y+3z=9 3x-2y+5z=11
用代入消元法解方程组:{y=x+1,3x+4y=11 {x-5y=0,3x+2y=17 {5x-3y=-1,3x+y=5