2x-1/9x=5/2+21.5
1个回答
2X—1/9X=5/2+21.5
18/9X—1/9X=5/2+43/2
17/9X=48/2
X=216/17
相关问题
2/1X+9/21/X-9=8/5
3y-1/2=1/3 x-8=2x+7 2x=5x-1 9-10x=9x-10 4/5x=5x-21
5/21x2/7+219/21x5/7+(1-2/7)
解方程(x+5)^2-(x-5)^2-(2x+1)(2x-1)+(2x)^2=21
解方程. 3x+ 1 2 = 5 3 x- 4 9 x= 10 21 5:8=x:32.
{2x-5y=21,{2x+y=6 {x-3y=1 {y=-2x+3 y=-x; y=1/2x+1 5x-9y=-13
分解因式:(X^2+5X-3)(X^2+5X+1)-21
(1) {3x-y=5 {5y-1=3x+5 (2) {2x>1-x {x+21+2x {3x+2
5X+8=13 5X+2=12 5X+7=12 5X+9=19 5X+11=21
求未知数:(1)[8/21]=[0.4/x](2)[2/3]:[5/6]=x:9(3)4:x=[1/2]×5(4)[1/