Các câu hỏi tương tự
7, Tìm x
a) \(\dfrac{1}{4}-\left|x+\dfrac{1}{2}\right|=\dfrac{1}{8}\) b) |2x-5|=x+3
c) |2x+1|-2x=6 d) |x-5|+x=5
7. Tìm x
a. |2x-5|+3x=12 b. |x+1|+|x+2|+|x+3|=4x
c. |x2+|x+2||=x2+3 d. |x2-3|=6
Tìm X
a) (\(\dfrac{1}{4}\) - X) ( X + \(\dfrac{2}{5}\) ) = 0
b) I 2x + 1 I +\(\dfrac{2}{3}\) = 2
c) (2x - 3 )\(^2\) = 36
d) 7\(^x\) + 2 +2 x 7\(^x\) = 357
.Tim x:
1. /x+1/+/x+3/=5
2. /x+1/+/x-2/+/x+3/=6
3. /2x-3/+/2x-5/=2
4. /x-5/-/x-6/=1
5. 2*/x+2/+/4-x/=11
6. /x-1/+/4-x/=3
7. /2x+5/+/2x-3/=8
Question Expandand simplify: 1. 8(x+5)-3(2x+7)
2. a(2b+c)+b(3c-2a)
3. 2y(y+5x)+x(3x+4y)
answer , 1. 8(x+5)-3(2x+7)=8x+40-6x+21=2x+61
2. a(2b+c)+b(3c-2a)=2ab+ac+3bc-2ab=ac+3bc=3abc^(2)
3. 2y(y+5x)+x(3x+4y)=2y^(2)+10xy+9x^(2)+4xy=9x^(2)+2y^(2)+14xy
a Explain what he has done wrong.
b work out the correct answer
tinh so huu ti x
2/3x-3/12=4/5-(7/x-2)
2x-3/3+-3/2=5-3x/6-1/3
tim x
(x-1).(x-2)>0
2x-3<0
(2x-4).(9-3x)<0
moi nguoi giup minh nhe cam on nhieu
Tim xthuoc Z biet:
1,|2x-5|-|2x+9|=0
2,|x+1|-|x+2|-|3-x|=7
3,|2x+3|+|3x+2|-|4-x|=10
Tìm x biết : a) 2x+3/15 = 7/5. b) x-2/9 = 8/3. c) -8/x = -x/18 d) 2x+3/6 = x-2/5. e) x+1/22 = 6/x f) 2x-1/2 = 5/x g) 2x-1/21 = 3/2x+1 h) 10x+5/6 = 5/x+1
a, Tim x biet:/x-2/+/3-2x/=2x+1
b, Tim x,y thuoc Z biet:xy+2x-y=5
c, tim x,y,z, biet :2x=3y;4y=5zva 4x-3y+5z=7