几道数学问题,在线等,急!求求你们了!解方程:2(x-2)-3(4x+1)=3(x-1)y-(y-1)÷2=2-(y+2)÷5(x-1)÷3-(x+2)÷6=(4-x)÷2+1化简求值:已知A=xx+2xy-3y*3y,B=5x*5x-xy+2y*2y,当X=2,Y=-3,求2A-3B的值.
2019-05-29
几道数学问题,在线等,急!求求你们了!
解方程:
2(x-2)-3(4x+1)=3(x-1)
y-(y-1)÷2=2-(y+2)÷5
(x-1)÷3-(x+2)÷6=(4-x)÷2+1
化简求值:
已知A=xx+2xy-3y*3y,B=5x*5x-xy+2y*2y,当X=2,Y=-3,求2A-3B的值.
优质解答
2x-4-12x-3=3x-3 x=-4/13
10y-5y+5=20-2y-4 y=11/7
2x-2-x-2=12-3x+6 x=11/2
A=-89 B=142 2A-3B=-604
2x-4-12x-3=3x-3 x=-4/13
10y-5y+5=20-2y-4 y=11/7
2x-2-x-2=12-3x+6 x=11/2
A=-89 B=142 2A-3B=-604