(7X+6)-3X=4*(2X+5)等于几?怎么求?

x+2x+3x+4x+5x+6x+7x+8x+9x=9x-8x-7x-6x-5x-4x-3x-2x-x.x等于多少? (x-1)(x-2)(x-3)(x-4)=(x+5)(x+6)(x+7)求X等于几? x+2x-3x-4x+5x+6x-7x.-196x+197x+198x-199x-200x 等于多少 *-----------------------------------------------*| 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 || 3x+1=5x+2=7x+4=13x+6 求x等于多少? x(x-1)(x-2)(x-3)(x-4)(x-5)(x-6)(x-7)(x-8)化简之后等于多少 5x+1小于等于4x+3,2x-3>x-4,2x+7>6+3x一个算式5x+1小于等于4x+3，{2x-3>x-4 2x+7>6+3x 3x小于4x,5x-4大于等于2+7x 4x-5大于2x+1,5x-9大于x-1 9x+4小于等于6x+1,2x-8小于x-7 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=? 利用等式的性质解下列方程,并写出检验过程∶5x-3等于7,4x-1等于3x＋3,x-5等于6,8-2x等于1011-x等于10x,4x-3等于2x-9,5＋四分之一x等于二分之一x-4,0.8x等于0.7x-1.实在不懂, 4X+6=5x-3 X等于多少 2x-1/3-x+1/6=x+7/4-1求x等于多少? x+5/7x=6 x x等于多少 (7X+6)-3X=4*(2X+5)等于几?怎么求? 求一个数独答案X X X 9 X X X 8 2 X 6 3 X X 1 4 X 99 X 8 X X X X X XX X X 6 7 X 3 X XX 4 6 X 5 X 2 9 XX X 7 X 2 3 X X XX X X X X X 7 X 17 X 4 3 X X 6 2 X6 3 X X X 7 X X X 2x^6×x³-3x^9+5x²×x^7等于多少 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