bai tim x
cau a |x-1/2 |=4
caub |x+3/4|-1/2=1
cau c 1/2+|x-4/3|=2
cau d |3x-1|+2=1
cau e |5/6+x|=3
Những câu hỏi liên quan
tim x
2/5+4/7 : x=3 cau 1
cau 2 5/6 -x : 2/3=1/2
ai nhanh minh tick
2/5 + 4/7 : x = 3
4/7 : x = 3 - 2/5
4/7 : x = 13/5
x = 4/7 : 13/5
x = 20/91
Câu 2 :
5/6 - x : 2/3 = 1/2
x : 2/3 = 5/6 - 1/2
x : 2/3 = 1/3
x = 1/3 x 2/3
x = 2/9
Đúng 0
Bình luận (0)
lấy 3 trừ 2/5 rồi lấy kết quả chia 4/7 câu 1
câu 2 bạn viết chẳng hiểu gì cả
Đúng 0
Bình luận (0)
Câu 1:
2/5+4/7:x=3
4/7:x=3-2/5
4/7:x=13/5
x =13/5*4/7
x = 91/20
Câu 2:
5/6-x:2/3=1/2
5/6-x =1/2*2/3
5/6-x =1/3
x = 5/6-1/3
x =1/2
K mk nha bn>_<
Đúng 0
Bình luận (0)
Xem thêm câu trả lời
Cau 1; chofrac{x}{2}frac{y}{5}vaxy90. So cap (x;y) thoa man laCau 2 : Cho a+db+c va a^2+d^2b^2+c^2(b,d khac 0).Khi do 4 so lap thanh ti le thuc naoCau 3 :GTLN cua phan so frac{7n-8}{2n-3}Cau 4: Cho Afrac{12}{x-15} dieu kien de 0A1 va A1Cau 5 ; tim x biet /-x-5//x510Cau 6: tap hop cac so nguyen cua x thoa man (3x^2-51)^2014(-24)^2014Cau 7: tap hop cac so thoa man /x-y/+/y+9/25/0
Đọc tiếp
Cau 1; cho\(\frac{x}{2}=\frac{y}{5}\)vaxy=90. So cap (x;y) thoa man la
Cau 2 : Cho a+d=b+c va \(a^2+d^2=b^2+c^2\)(b,d khac 0).Khi do 4 so lap thanh ti le thuc nao
Cau 3 :GTLN cua phan so \(\frac{7n-8}{2n-3}\)
Cau 4: Cho A=\(\frac{12}{x-15}\) dieu kien de 0<A<1 va A>1
Cau 5 ; tim x biet /-x-5//x=5=10
Cau 6: tap hop cac so nguyen cua x thoa man (3x^2-51)^2014=(-24)^2014
Cau 7: tap hop cac so thoa man /x-y/+/y+9/25/=0
tim n
cau a ; (9/25)^n=(3/5)^4
cau b ; (2^n-2)^2=16
cau c (1-x)^3=216
3^x^2-3^x=162
a)Ta có:(9/25)n=(3/5)4=>(9/25)n=(9/25)2=>n=2
b)(2n-2)2=16=>2n-2=4 hoặc 2n-2= -4=>2n=6 hoặc 2n=-2=>không tìm được giá trị của n thỏa mãn
c)(1-n )3=216=>(1-n)3=63=>1-n=6=>n=-5
Đúng 0
Bình luận (0)
cau 1cau 2cau 3 cau 4 cau 5 giúp với mn :
Đọc tiếp
cau 1
cau 2
cau 3
cau 4
cau 5
giúp với mn :>>
Bai 1: Tim so nguyen x biet:
x+(x+1)+(x+2)+...+35=0
Bai 2: Tim GTLN:
a) 8-(x+2)^2=E
b) -|x+2|+10=F
Bai 3: Tim x \(\in\)Z:
a)(2x-4)(x+4)<0
b)(x+5)(3x-12)>0
Bai 11: Cho:
S=1-2+3-4+5-6+...+19-20
a) S co\(⋮\)2; 3; 5 khong?
b) Tim tat ca cac uoc cua S
chi tiet gi minh nha
cau 1: tinh gia tri cua x thoa manleft(x-3right)left(x^2+3x+9right)+xleft(x+2sqrt{2}right)left(2sqrt{2}-xright)-3cau 2.tinh GTLN cua bieu thuc2x-2x^2+13cau 3. tinh gia tri cua bieu thuc frac{3^{left(x+yright)^2}}{3^{left(x-yright)^2}}voi xyfrac{1}{2}cau 4. tim GTLN cua-3x^2-6x-4cau 5. cho ham so : f(x)frac{1}{5x+9}tinh gia tri cua fleft(frac{40}{25}right)cau 6. cho hinh thang can ABCD . Day nho AB,goc D bang 64 do. tinh so do goc ngoai tai A
Đọc tiếp
cau 1: tinh gia tri cua x thoa man
\(\left(x-3\right)\left(x^2+3x+9\right)+x\left(x+2\sqrt{2}\right)\left(2\sqrt{2}-x\right)=-3\)
cau 2.tinh GTLN cua bieu thuc
\(2x-2x^2+13\)
cau 3. tinh gia tri cua bieu thuc
\(\frac{3^{\left(x+y\right)^2}}{3^{\left(x-y\right)^2}}\)voi xy=\(\frac{1}{2}\)
cau 4. tim GTLN cua
\(-3x^2-6x-4\)
cau 5. cho ham so : f(x)=\(\frac{1}{5x+9}\)
tinh gia tri cua \(f\left(\frac{40}{25}\right)\)
cau 6. cho hinh thang can ABCD . Day nho AB,goc D bang 64 do. tinh so do goc ngoai tai A
cau 1a,-/-7/.[(-2)4+(-36):(-32)]-(-5)3câu 2a,2.(x-3)-3.(x-5)4.(3-x)-18b,-2x-11chia het cho 3x+2c,x-7 chia hết cho x + 6d,-112-56:x2-126e,2.(x-7)-3.(5-x)-109cau 3chứng minh đẳng thức -a.(c-đ)-d.(a+c)-c.(a+đ)cau 4chung minh gia tri bieu thuc sau khong phu thuoc vao a(3a+2).(2a-1)+(3-a).(6a+2)-17.(a-1)
Đọc tiếp
cau 1
a,-/-7/.[(-2)4+(-36):(-32)]-(-5)3
câu 2
a,2.(x-3)-3.(x-5)=4.(3-x)-18
b,-2x-11chia het cho 3x+2
c,x-7 chia hết cho x + 6
d,-112-56:x2=-126
e,2.(x-7)-3.(5-x)=-109
cau 3
chứng minh đẳng thức -a.(c-đ)-d.(a+c)=-c.(a+đ)
cau 4
chung minh gia tri bieu thuc sau khong phu thuoc vao a
(3a+2).(2a-1)+(3-a).(6a+2)-17.(a-1)
bai 1:tim x(chu y dau * la dau nhan)
a)(x+1/4)+(3x-4)+2*(x-3)=1
b)2*(x-3)=3(x+2)-x+1
c)x*(x+3)+x(x-2)=2x*(x-1)
d)(x-1)*3x-2*(x+2)-2x=x(x-1)
a: \(\left(x+\dfrac{1}{4}\right)+\left(3x-4\right)+2\left(x-3\right)=1\)
=>\(x+\dfrac{1}{4}+3x-4+2x-6=1\)
=>\(6x-\dfrac{39}{4}=1\)
=>\(6x=1+\dfrac{39}{4}=\dfrac{43}{4}\)
=>\(x=\dfrac{43}{4}:6=\dfrac{43}{24}\)
b: \(2\left(x-3\right)=3\left(x+2\right)-x+1\)
=>\(2x-6=3x+6-x+1\)
=>2x-6=2x+7
=>-6=7(vô lý)
c: \(x\left(x+3\right)+x\left(x-2\right)=2x\left(x-1\right)\)
=>\(x^2+3x+x^2-2x=2x^2-2x\)
=>3x-2x=-2x
=>3x=0
=>x=0
d: \(\left(x-1\right)\cdot3x-2\left(x+2\right)-2x=x\left(x-1\right)\)
=>\(3x^2-3x-2x-4-2x=x^2-x\)
=>\(3x^2-7x-4-x^2+x=0\)
=>\(2x^2-6x-4=0\)
=>\(x^2-3x-2=0\)
=>\(x=\dfrac{3\pm\sqrt{17}}{2}\)
Đúng 1
Bình luận (0)
Bai 1: Tim x
a) \(|\text{x-1|+|2x+4|=3}\)
b) \(|x+\dfrac{1}{3}|=|3x-\dfrac{5}{6}|\)
c) 4x.\(\left(x+\dfrac{1}{2}\right)=0\)
d) 3x.(x+2)-5(x+2)=0
