x-3(7x-(x-9-3(1-2x)))
1个回答
原式=x-3{7x-[x-9-3(1-2x)]}.
=x-3{7x-[x-9-3+6x]}
=x-3[7x-(7x-12)].
=x-3(7x-7x+12).
=x-36.
相关问题
解下列方程3=11-X;3-X=7;2X+3=X-1;2X-1=-X+5;11/9X+2/7=2/9X-5/7;1/2X
(9x²-2x+7)-(x²+3x-2) =9x²-2x+7+x²-3x+2 =
3X(3)+5X(2)=9,7X(3)+9X(2)=7
(3x^2+9x+7)/(x+1)-(2x^2+4x-3)/(x-1)-(x^3+x+1)/(x^2-1)=
(3x^2+9x+7)/(x+1)-(2x^2+4x-3)/(x-1)-(x^3+x+1)/(x^2-1)=
x-([1/3]+[2/3])=[7/12] 2x+[7/9]=[7/9] 15x-4.5×2=51 7x+3x+26=
7-9x/2-3x -4x-5/2-3x =1 x=?
(9x+2/7)-(3x-14/2)=1+(2x+3/3)
1.(7X-3X+5.9)/3=2.9