1-3(8-x)=9-2(15-2x)怎么解?,急
1-3(8-x)=9-2(15-2x)怎么解?,急
15(3X-8)-4(2X+3)=6(4X-9),怎么解方程?急
x-3分之2x=42 怎么解? 急.
7(2X-3)+15=2X-5怎么解?急!
2- 6分之x+5=x- 3分之x-1 ,0.03分之0.1-0.2x-1=0.4分之0.7-x 怎么解方程!急
3(x-2)=5x-1 解方程,急
2/(X-2)+X/(X+3)=1 怎么解
1x+2x+3x+4x+5x+6x+7x+8x+9x+10x+11x+12x+13x+14x+15x=550
5x+7=2x+21,0.13x+12=0.8x-1,3(x-7)-(x-4)=15,解方程,急,
8(3x-1)-9(5x-110-2(2x-70)=30怎么解?
(2x-1)^2 -(3x+1)(3x-1)+5x(x-1),其中x=2/9 急 急!
4x²-1/3x²-x·9x³-x/2x^4-x³计算 急