34-x+6-3x=30

34-x+6-3x=30 x+2x+3x+4x+5x+6x+7x+8x+9x=9x-8x-7x-6x-5x-4x-3x-2x-x.x等于多少? 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 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=? x+35=(x+3x)*30% 3x+5x-6x=? 5X+6(X+10)+10(X+30)+6(X+70)+3(X+150)=2730,X等于多少 帮我解几道方程、、8x-4（10-x）=44 60x+(100-x)*65=100*63 30x-20(180-x)=5250 0.4x+0.2(99-x)=34 4x+3(x+8)=164 (x+6)*4+(x+x+6)*10=660 每步都写清楚点 please! *-----------------------------------------------*| 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 || x(x*x-6x-9)-x(x*x-8x-15)+2x(3-x) 解方程 13x-8+(10-3x)=34 1.8+6-(1.5+0.4x)=8.7 55%x-(0.25+0.6)=1.6 3x+50%(30-x)=35 3(x+2)-2(x-3)=16 x-(30-x)=(30-x)-x/3,怎么解 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 x/6+x/12+x/20+x/30=1