(x-15)*3=88-x+15
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(x-15)*3=88-x+15
(x-15)*3=88-x+15
(x-15)*3=88-x+15
3x-45=103-x
4x-45=103
4x=148
x=37
3x-45=88-x+15
4x=148
x=37
(x-2)(x²-6x-9)-x(x²-2x-15),其中x=1/3
x(x*x-6x-9)-x(x*x-8x-15)+2x(3-x)
X(x平方-6x-9)-x(x平方-8x-15)+2x(3-x)其中x=-六分之一
3X+30+X+X-15=?
13x-15x+x=-3
3x-x(10-x)=15
x+x=x+15
5x+15x =( + )x =20x
15x(3x-8)-4X(2X+3)=6X(4X-4)-4
证明(x+1)(X+3)(x+5)(x+7)+15=(X+8x)+22(x+8x)+120
(x-15)*3=88-x+15
计算1/[x(x+3)]+1/[(x+3)(x+6)]+.+1/[(x+15)(x+18)]=?
解方程(x-3/x)-(3-x/x+1)=5x-15/2x+2
x(-6x-9)-x(-8x-15)+2x(3-x)=?
4.2-0.6x=3.6x 5x+2x=33.6 7x-4x=0.75 2x+7x+2.1=12 56x-32x-119=361 x+5=2x 3x+9=6x 4x-28=2x 2x+18=7x 5x=25*4-15x 7x-x+2*3=29.4 (28.8+5.5x+3.2)除2=71
1x+2x+3x+4x+5x+6x+7x+8x+9x+10x+11x+12x+13x+14x+15x=550必须用解方程
因式分解法解下列方程 1、用因式分解法解下列方程:(1)3y^2-5y=0 (2)4x^2=12x (3)x^2+9=-6x (4)9x^2=(x-x^3-3x^2-13x+15 =x^3-3x^2+2x-15x+15 =x(x^2-3x+2)-15(x-1) =x(x-2)(x-1)-15(x-1) =(x-1)[x(x-2)-15] =(x-1)[x^2-2x-15] =(x-1)(x-5)(x+
请问,这十道关于一元一次方程的题目我做对了吗?(1)2X+3X+4X=189X=18X=2(2)13X-15X+X=-3-1X=-3X=3(3)2.5X+10X-6X=15-21.56.5X=6.5X=1(4)4X+3(2X-3))=12-(X+4)4X+6X-9=12X-4810X-12X=-48+9-2X=-57X=28.5(5) 7X+2(3X-3)=207X+6X-6=2013X=20+6