(30×8+x)÷9-16=x

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(30×8+x)÷9-16=x
(30×8+x)÷9-16=x

(30×8+x)÷9-16=x
(30×8+x)÷9-16=x
240+x-144=9x
9x-x=240-144
8x=96
x=12

240+x-144=9x
8x=96
x=12

哪个x的值是方程的解?x÷6=0.3 (x=20,x=1.8) 43+x=60 (x=19x=105)接着上面的    9x-5x=16  (x=64 x=4)   3.8x-x=5.6   (x=2 x=2.8) (30×8+x)÷9-16=x 6.8+12÷x=10.8,14-0.5(x+3)=7.8,3.5x-3x-10=8,7.9-5x=7.8÷210x-20=6x,10+6x=8x,2(x+54)=8x,25-2x=5+2x x+60%x=80 80%-30x=305 35%x=210 x+50%x=60 x-40%x=0x+60%x=8080%-30x=30535%x=210x+50%x=60x-40%x=0.36(1-80%)x=21么么哒! 化简[(x的平方-4)/(x的平方-4X+4)-(2-X)/(X+2)]÷x/(x-2)-8/(X-2)B:8/(X-2)C:-8/(X+2)D:8/(X+2) 解下列方程(2)4x²+12x+9=81 (4)2x²+3x=3 (6)x(2x-5)=4x-10 (8)1-8x+16x²=2-8x 数学题(x-4)/(x-3)+(x-6)/(x-5)=(x-8)/(x-7)+(x-10)/(x-9)解方程,(x-4)/(x-3)+(x-6)/(x-5)=(x-8)/(x-7)+(x-10)/(x-9)解方程, 8x+4=32.(X+3)/6=9X=?X=? 解方程:x-19分之5x-96+x-9分之x-8=x-6分之4x-19+x-8分之2x-21解方程:(x-19)分之(5x-96)+(x-9)分之(x-8)=(x-6)分之(4x-19)+(x-8)分之(2x-21) 解方程 8x+3×1.5=16.5 6x+1.2x=14.4 (x+7.3)×2.5=25解方程8x+3×1.5=16.56x+1.2x=14.4(x+7.3)×2.5=258x÷1.2=23x+(10-x)=12.8(13-0.5)x=16÷1.6 已知道X=10,求根号X*X-8X+16+根号X*X-6X+9的值 x^-16/(x^+8x+16) +x/(x-4) x²÷(2x)³-x(3x+8x²²) .2x(3x+1)=9x+3(x+8)(x+1)=12 2012贵州先化简1/x+1-3-x/x2-6x+91/(x+1)-[(3-x)/(x^2-6x+9)]÷[(x^2+x)/(x-3)]=1/(x+1)+[(x-3)/(x-3)^2][(x-3)/(x^2+x)]=1/(x+1)+1/(x^2+x)=1/(x+1 解方程,怎么写(1)50-x=8.09   (2)5X-16=40+3x  (3)2(X-12)+0.8=6.8 (4)x÷2+3.5=7.5x(5)4.8-4x=1.2+5x(6)12.5x-0.41=8.4x(7)3.2x+2.4=1.8x+3.8(8)4.5(2x+6)÷2=18(9)21.6-3x=x+1.6(10)2(x-12)+0 -x+8=0 (x+√7)(x-√7)=18 9(2x-3)=16(x+2) 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}