www.3112.net > 解方程:(1)(1%4/9)X=3/5 (2)2X÷10/11=4/15

解方程:(1)(1%4/9)X=3/5 (2)2X÷10/11=4/15

1)x÷14/15=1/7x=(1/7)*(14/15)=14/(7*15)=2/15 2)(1-5/8)x=10(8/8-5/8)x=10(3/8)x=10x=10/(3/8)=10*8/3=80/3 3)1/5+4x=4/54x=4/5-1/54x=3/5x=(3/5)/4=3/20

是4啊,不信你验算一下,可能是你忘写解了吧1/2X4除以1/5=1010X1/5=1/2x1/2x=2x=4

2x/(10/11)=4/152x*11/10=4/1522x/10=4/15330x=110 x=1/3

(1) 1 5 +4x= 4 5 , 1 5 - 1 5 +4x= 4 5 - 1 5 , 4x= 3 5 ,4x÷4= 3 5 ÷4, x= 3 5 * 1 4 , x= 3 20 ;(2) 3 4 x= 8 9 ÷ 2 3 , 3 4 x= 8 9 * 3 2 , 3 4 x ÷ 3 4 = 8 9 * 3 2 ÷ 3 4 , x= 8 9 * 3 2 * 4 3 ,x= 16 9 ;(3)2x-20%x=36, (2-20%)x=36, 1.8x=36, 1.8x÷1.8=36÷1.8, x=20.

8(x-1)-4(2x+3)=5(x-2) 8x-8-8x-12=5x-10 -20=5x-10 5x=10 x=2

(1)2x* 14 15 =16, 2x* 14 15 ÷ 14 15 =16÷ 14 15 , 2x= 120 7 , 2x÷2= 120 7 ÷2, x= 60 7 ;(2) 1 4 ÷x=2 2 5 , 1 4 ÷x*x=2 2 5 *x, 2 2 5 *x= 1 4 ,2 2 5 *x÷2 2 5 = 1 4 ÷2 2 5 , x= 5 48 ;(3)4-2x= 7 3 , 4-2x+2x= 7 3 +2x, 7 3 +2x=4, 7 3 +2x

2x除以4分之3=15%2x=0.15*3/4x=0.15*3/4÷2x=9/160

1.解: 原方程左右两边同时除以2 得 3-x=-2(x+5) 得 3-x=-2x-10 得 2x-x=-3-10 解得 x=-132.3(-2x-5)+2x=9 -6x - 15 + 2x =9 -4x -15 =9 -4x =24 x= -63. 1/2x-2-3x-4=-15/2 -5/2x=-15/2+6 -5/2x=-3/2 x=3/54.x/4 -7- 5x/3 +8=1 (3x-20x)/12=2 -17x=24 x=-24/17

解方程: 2、3/5x-1/4x=7 3、8/11:10=4/5:x 4、x:28%=1又3/4:0.71、x÷5/6=30 7/20x=7 8/11x=10*4/5 解: 0.7x=7/4*7/25解: x=30*5/6 解: x=7÷7/20 解: x=8÷8/11 x=49/100除以7/10 x=25 x=20 x=11 x=7/105、1/2+1/3x=10 6、486-23x16 1/3x=10-1/2 =486-368 x=19/2除以1/3 =118 x=123.5【回忆的沙漏038为你解答】【有什么不明白可以对该题继续追问】【如果满意,请及时选为满意答案,谢谢!】

(1)2x- 3 4 x÷ 4 5 =510, 2x- 15 16 x=510, 17 16 x=510, 17 16 x* 16 17 =510* 16 17 , x=480;(2)5:(x-1)= 3 20 :18%, 3 20 *(x-1)=5*18%, 3 20 *(x-1)* 20 3 =0.9* 20 3 , x-1+1=6+1, x=7.

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