3x+15y=50解得x,y是几
x+x+x=15,x+y+y=19,求y-x等于几
x+3=5-y,那么x+y等于几
X与Y是无理数,X+Y=2,X,Y各等于几?
将3x-y=7和2x+y=8组成方程组得,3x-y=72x+y=8,解得,
(1)x+y=15 (2)5x-2(10-x)=6y-3(10-y)+19 解得x=9
十万分,[3x+2y]/2=[2x+y]/3=[x-y+1]/4 解得.
请回答5x=6y是X是几Y是几?
若x+3y=3x+2y=7,则x+y=几?
3X=7Y 解得:Y=51,X=170-51=119
用代入法解方程组3x+4y=2,2x-y=5使得带入后化简比较容易变形是()1.由1得,x=2-4y/3 2.由1得y=
解方程组:2(x+y)-3(x-y)=34(x+y)+3x=15+3y.
解方程x+y+(x+y/2)=15 3x+5y+4(x+y/2)=62