[30/17+(Y-1.5)÷17/12]×51/8=12
y-12/y=?
[3x+8y=14 x+5y=12 ] [ 8x-2y=36 3X+y=17 ] [ x+5y=15 5x-y=49 ]
8y+12=8-8y-5y+10
8y-4=12-5y+9y
1.5y+8y-6y=2y-3
17(2-3y)-5(12-y)=8(1+7y),6(2-3分之1y)-5分之1(10-5y)=1,2【分之4x-(3分
17(2-3y)-5(12-y)=8(1+y)怎么解 x-3(x-2)=2怎么解
5(x-2)+1=x-(2x-1)和17(2-3y)-5(12-y)=8(1-7y)
(1)y+3x+17=0 5y-2x+17=0 (2)x+y+z=12 x+2y+5z=22 x=4y (3)x+y+z
解方程 2x+3y=21 5x+4y=59 12x+5y=99 2x+3y=18 2x+3y=24 8x+5y=51 5
8y+12=9y-2怎么算
若x的平方-2y+y的平方+8y+17=0,则x= ,y=