5x＋3x＋6×1.5=

(X+5)/(X+4) ＋(X+8)/(X+7 )=(X+7)/(X+6 )＋(X+6)/(X+5 ) 0.3x＋7x-0.25x=21.58.7×(36-x)=04（不知道是x还是× 都解了吧）x或者×(x＋0.2)=1.27(x＋6)-3x=4x(2x＋5)3(x＋2)=4(x＋1)18-4x=2x-63.8x＋1.2x=256x＋1.5x=15呼呼.累死我了 着急 5x＋3x＋6×1.5= x+2x+3x+4x+5x+6x+7x+8x+9x=9x-8x-7x-6x-5x-4x-3x-2x-x.x等于多少? 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 试解方程：2/(x+1)(x+2) + 2/(x+2)(x+3)＋ … ＋2/(x+10)(x+11)=5x/(x+1)(x+11) *-----------------------------------------------*| 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 || 计算3/X-6/1-X-X＋5/X的平方-X 解方程 x(2x-5)-x(x＋2)=x²-6 5X(X－X)=3(X＋X)这个方程帮忙解一下 解方程x/(x-2)=2x/(x-3)+(1-x)/(x-5x+6) 2x+3x+4x+5x+x+6x+7x=100 x+2/x+1-x+4/x+3=x+6/x+5-x+8/x+7 x=? 已知3x*x-x=1,求6x*x*x+7x*x-5x+2000 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 3x+5x-6x=? x²＋x=5x＋6 2x＋3=x-5,求x.