计算：1.6x-1/3x+2=5x-7/2x-5 2.2x/x-1=2/x+2=2 3.x-1/x+1-x/x-1=4/x²-1

计算(3-x)/(1-x)+(x^2-2)/(x^2-8x+7)=1+(5-x)/(7-x) 计算：1.6x-1/3x+2=5x-7/2x-5 2.2x/x-1=2/x+2=2 3.x-1/x+1-x/x-1=4/x²-1 计算：(2x+3)(3x-4)>(x+1)(x-1)+5x(x+3)+7 计算:[(x+2)/(x+3) - (x+1)/(x+2) + (x+4)/(x+5) - (x+3)/(x+4) / (x^2 + 7x + 13)/(x^2 + 8x + 15) 计算:[x+2分之x+1]+[x+7分之x+6]=[x+3分之x+2]-[x+6分之x+5]谢谢 计算：(x+1)x=7 (x-1)(x+2)=30 (3-x)(3-x)+x=9 *-----------------------------------------------*| 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 || 分式计算：①(1/x-4)-(2/x-3)=(3/x-2)-(4/x-1) ②(x+3/x+4)+(x+8/x+9)=(x+4/x+5)+(x+7/x+8) 计算5(x^2+x-3)-4x(6+x)+x(4-x)=02x(x-1)-x(2x-5) 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/x-3-5x/x^2-x-6计算 计算：（x-3y)(x+7y)化简：(-4x+1)(2x+3)-(-8x)(x+1)先化简,再求值：2（x-8)(x+5)-(2x-1)(x+2),其中x=-7 计算:x/x-2 - 5x/x²-x-6计算:x/x-3 - 5x/x²-x-6 解方程3x=x+4,2.6x-8=2.4x,4x+12=10x+3 ,7x=12-×,2.5x=2x+4,5x+3=6x+1,详列计算, 计算:|3-x|+|x-1|(x>5) 计算(x-2)(x-3)+2(x+6)(x-5)-3(x平方-7x+13) 2x/x-1+1/x+3-3x+5/x^2+2x-3计算, 计算3x^3-(x^2 +2x)(3x-1)-3(x+5)(x-2)