1.8-8x/1.2-1.2-3x/2-5x-0.6/0.3=2.9那啥,是要先去分母的哈,一元一次方程...

8x-5.5x=7.57.2x÷3.6=2 3x＋6x-8x=0.7 12x-2x-5x=4.512x-x=0 5x＋x=1.8 3.2x＋1.8x=64.8x-0.8x=6 6.3-0.3x=9.6 8.6x-8.5x=0.720x-2x=36 9x＋6x=4.5 18x-12x=5.42x-1.6x=3.6 18x＋3x=7×6 1.2x-0.5x=0.71.3x＋2.7x=1 4x-3.2x=6.4 0.8x＋3.2x＋3x=562.8x-2x=7.2 *-----------------------------------------------*| 6 4 X | 8 X X | X X 5 || X X X | X X X | X 7 8 || X X X | X X X | X X X ||---------------+---------------+--------------- || X X X | X X X | 5 1 X || X X X | X 6 X | X X X || 8 X X | 3 5 X | 2 X X || 5x-4x=2*1.8,5x-2+3x=3.6,x+4x=20.3,8x+10-3x=30,10.5-0.5x+0.5=1,x+2x+5x=10,解方程,5x-4x=2*1.8,5x-2+3x=3.6,x+4x=20.3,8x+10-3x=30,10.5-0.5x+0.5=1,x+2x+5x=10,0.8x-0.2+1.2x=1.8,2.4x+0.6+1.6=8 x(x*x-6x-9)-x(x*x-8x-15)+2x(3-x) 填九宫格帮帮忙.x x 6 x x 7 x x 98 x x x 3 x 1 x x 9 x x 6 x 5 x 3 x x x 3 x x x x 1 8x x x 9 x 1 x x x2 1 x x x x 6 x x x 6 x 7 x 3 x x 1 x x 9 x 2 x x x 47 x x 8 x x 5 x x 解方程1.8-8x/1.2-1.3-3x/2-5x-0.4/0.31.8-8x/1.2-1.3-3x/2-5x-0.4/0.3=0 （1）4x-1.2=10.8-4x （2）1.2x+8.5=5x-1 (3)1.8-2.4x=8x-0.72速喥 1.2-5x+x*x2.2x*x-5x+13.x*x-3/2*x-24.-x*x-4x+3 5x-0.3/0.4=3x-12/0.6-1.8-8x/1.2 x-9/6-2+x/3+1=x- x-2/4 这里是两道题 前一道 至8x/1.2为止 1.8-8x/1.2-1.3-3x/2=5x-0.4/0.3如何计算结果X=11/5? 1.8-8x/1.2-1.3-3x/2-5x-0.4/0.3=0 1.8-8x/1.2-1.3-3x/2=5x-0.4/0.3我急 (1.8-8x)/1.2-(1.3-3x)/2-(5x-0.4)/0.3=0 1.8-8x/1.2-1.3-3x/2-5x-0.4/0.3=0 1.8-8x/1.2-1.3-3x/2-5x-0.4/0.3=0 （5x-0.4）/0.3+（1.3-3x）/2=（1.8-8x）/1.2 1.2x^2+x >02.x^2-3x-18≤03.-x^2+x≥3x+14.x（x+9）＞3（x-3） 1 2x-1/2(x-1/2(x-1))=2/3(x-1)2 1.8-8x/1.2 -1.3-3x/2=5x-0.4/0.33 x/1*2+x/2*3+.+x/2007*2008=20074 已知关于X的方程3（x- 2(x-a/3))=4x和3x+a/12 -1-5x/8=1有相同的解,求这个解