x÷12-8+4 （6x-90+2x)÷2=55 12x=24-6x=102 35x-77=28x x-47.26=0,45*1,08 （9x-52+3x）÷2 =100x+14=2x-4

*-----------------------------------------------*| 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^2+2x-8/x^3+2x^2+x]÷[(x-2/x)×(x+4/x+1)]化简[x^2+2x-8/x^3+2x^2+x]÷[(x-2/x)×(x+4/x+1)]化简 x²•x^7+x^12÷x^8•x^6-x^m+6÷x^m-4 (x+1-1/1-x)÷(x-x²/x-1) (x-4/x-x-6+ x+2/x-3)÷x+1/x-3 1.(x^3-x^2-4x+1)/(x^2-3x+2)-(x^3-2x^2-9x+21)/（x^2-5x+6）+（x^2-3x+8）/（x^2-4x+3）2.{(x^2)/（x-y)}*{y/(x+y)}-{(x^4y)/(x^4-y^4)}÷{（x^2/x^2+y^2）^2} 8x^2-4x/x^2-x-6÷(x-3/x+2-x+2/x-3),其中x=5 (8x^4-6x^3-4x^2+10x)÷(-2x)等于 分式化简(要求解答过程)(1) 1/(x+1)+1/(x+3)-1/(x+5)-1/(x+7)(2) [(x^2+x-2)/(x^2+7x+12)]÷[(x^2+x-2)/(x^2-x-12)]÷[(x^2+3x-4)/(x^2-6x+8)] 化简代数8X-9-6-4X+X -10X-3Y+20+12X+5X2Y6X+4X÷2-7-5X+3 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 1+x+x^2+x^3+x^4+x^5+x^6+x^7+x^8+x^9+x^10+x^11+x^12=97.8x+x^2+x^3+x^4+x^5+x^6+x^7+x^8+x^9+x^10+x^11+x^12=97.8 好多年没有用过过数学公式了 想不起来怎么算了 想知道 X值是多少 (2x-6)/(x²-4x+4)÷(3-x)/(x²+6x+9)×(2-x)/(x+3) (6x^4-8x^3)÷(-2x^2) [4(x-2)^2+12(x+2)(x-2)-8(x-1)^2(x-2)〕÷4(x-2) 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 1.计算 ：[4(x-2)+12(x+2)(x-2)-8(x-2)(x-1)]÷4（x-2） 1.计算①(x-1-x+1分之8)×x+3分之x+1；②x+3y分之x-y÷x²+6xy+9y²分之x²-y²-x+y分之2y；③（x-x+1分之2x）÷x²-1分之x²-2x+1④（x²-2x分之x+2-x²-4x+4分之x-1）÷x³-2x²分之x-4 x÷12-8+4 （6x-90+2x)÷2=55 12x=24-6x=102 35x-77=28x x-47.26=0,45*1,08 （9x-52+3x）÷2 =100x+14=2x-4