(2+0.5X)*8-0.6X=39.8这是一到方程题,不太好做.

x/x-2+x-9/x-7=x+1/x-1+x-8/x-6, x/x-2+x-9/x-7=x+1/x-1+x-8/x-6, x+17=3(x+13),2x-11.2=0.6x,2.5x-2.17=21.9-5.8x,8（x-1.5）=x+0.6,2（0.5-x）+6=3x-2.53,用方程解 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 6x+15=87 8X-0.5x=15 x+0.6x=11.2 x+2x+3x+4x+5x+6x+7x+8x+9x=9x-8x-7x-6x-5x-4x-3x-2x-x.x等于多少? 0.5(X+8)=0.6x求x x/0.5-0.4x-0.6/0.2=2(-x+3) (x+12)(x-2)+(x+7)(x+8)-(x+5)(x-10),其中x=2 0.5x+2=0.6x-11 x+2/x+1-x+4/x+3=x+6/x+5-x+8/x+7 x=? 解方程(x/x(x+2))+(x/(x+2)(x+4))+.+x/(x+8)(x+10)=1 X(x平方-6x-9)-x(x平方-8x-15)+2x(3-x)其中x=-六分之一 x^2+8x+ =(x+ )^2 x(x-4)=2-8x (x+1)/(x+2)+(x+8)/(x+9)解答x+1/x+2+x+8/x+9=x+2/x+3+x+7/x+8 解方程:X/4+8=2008 40%X-1.6=12 24:2/3=X:0.5X/4+8=200840%X-1.6=1224:2/3=X:0.54X-12=6X除3+0.6=3（x-1.5）乘4=263x+4+x=80x/3-x/6=2.460+3x-x=801.5x+36=x+45 *-----------------------------------------------*| 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 ||