tìm x
a, 2/3x - 4/9 =-5/27
b, 2/3x+4/9=5/27
c, x:1,2 = 5,4 :6
d, 1,68:1,2 =5,4:x
e, ( 1-2x)^2+1 = 10
f, (1-2x)^2-6 = 10
Những câu hỏi liên quan
a) 2/3 x -3/2 x =5/12
b)2/5 + 3/5.( 3x -3,7) =-53/10
c) 7/9 : ( 2 +3/4 x) + 5/9 = 23/27
d) -2/3 x + 1/5 =3/10
e) |x| - 3/4 =5/3
F) |2x - 1/3| + 5/6 = 1
Bài 1 : Tìm số x biết :
a) 2/3.x-3/2.x=5/12
b)2/5+3/5.(3x-3,7)= -53/10
c)7/9:(2+3/4x)+5/9=23/27
d) -2/3.x+1/5=3/10
e) |x|-3/4=5/3
f) |2x-1/3|+5/6=1
tìm x
a) 5/8 - x = 2 1/6
b) 4/9 : x = -1/3+1 1/6
c) (3x-2)^3 = -1 / 27
d)/3x-4/ = 16 1/9 + 18/19
e) /2x + 1/=x+2
\(a)\frac{5}{8}-x=2\frac{1}{6}\)
\(\Rightarrow\frac{5}{8}-x=\frac{13}{6}\)
\(\Rightarrow x=\frac{5}{8}-\frac{13}{6}\)
\(\Rightarrow x=\frac{15}{24}-\frac{52}{24}\)
\(\Rightarrow x=-\frac{37}{24}\)
\(b)\) \(\frac{4}{9}:x=-\frac{1}{3}+1\frac{1}{6}\)
\(\Rightarrow\frac{4}{9}:x=-\frac{1}{3}+\frac{7}{6}\)
\(\Rightarrow\frac{4}{9}:x=-\frac{2}{6}+\frac{7}{6}\)
\(\Rightarrow\frac{4}{9}:x=\frac{5}{6}\)
\(\Rightarrow x=\frac{4}{9}:\frac{5}{6}\)
\(\Rightarrow x=\frac{4}{9}.\frac{6}{5}\)
\(\Rightarrow x=\frac{8}{15}\)
\(c)\left(3x-2\right)^3=-\frac{1}{27}\)
\(\Rightarrow3x-2=-\frac{1}{3}\)
\(\Rightarrow3x=-\frac{1}{3}+2\)
\(\Rightarrow3x=-\frac{1}{3}+\frac{6}{3}\)
\(\Rightarrow3x=\frac{5}{3}\)
\(\Rightarrow x=\frac{5}{3}:3\)
\(\Rightarrow x=\frac{5}{9}\)
d ) và e ) tự làm
Chúc bạn học tốt !!!
Đúng 0
Bình luận (0)
5/8-x=21/6
x=5/8-21/6
x=-23/8
Vậy x=-23/8
b, 4/9:x=-1/3+11/6
4/9:x= 3/2
x= 4/9:3/2
Đúng 0
Bình luận (0)
tìm x biết:
a)2/3x-3/2x=5/12
b)2/5+3/5.(3x-3,7)=-53/10
c)7/9:(2+3/4x)+5/9=23/27
d)-2/3.x+1/5=3/10
e)|x|-3/4=5/3
f)|2x-1/3|+5/6=1
giúp mik vs mik đang cần gấp bn nào giải mik cũng tick nha
giải hết giúp mik các bn nhé
Tìm x bt
A:|x+75%|= 2/1/5
B: (x+1/2). (2/3-2x)= 0
C: | 2x -1/3|+ 5/6= 1
D: x+2/5= 7/12-1/1/4
E: (x+ 2/3). (-3/5 -2x)= 0
F: (2/4/5 x- 50): 2/3=51
G: 2/5+ 3/5. (3x- 3,7)= -53/10
H: 7/9:( 2+3/4x)+ 5/9= 23/27
a: =>|x+3/4|=2+1/5=11/5
=>x+3/4=11/5 hoặc x+3/4=-11/5
=>x=29/20 hoặc x=-59/20
b: (x+1/2)(2/3-2x)=0
=>x+1/2=0 hoặc 2/3-2x=0
=>x=-1/2 hoặc x=1/3
c: =>|2x-1/3|=1/6
=>2x-1/3=1/6 hoặc 2x-1/3=-1/6
=>2x=1/2 hoặc 2x=1/6
=>x=1/4 hoặc x=1/12
e: =>x+2/3=0 hoặc -2x-3/5=0
=>x=-2/3 hoặc x=-3/10
Đúng 0
Bình luận (0)
a,4x-10=0 b, 7-3x=9-x c, 2x-(3-5x) = 4(x+3)
d, 5-(6-x)=4(3-2x) e, 4(x+3)=-7x+17 f, 5(x-3) - 4=2(x-1)+7
g, 5(x-3)-4=2(x-1)+7 h,4(3x-2)-3(x-4)=7x+20
`a,4x-10=0 `
`<=> 4x=10`
`<=>x=10/4`
`<=>x=5/2`
`b, 7-3x=9-x `
`<=>-3x+x=9-7`
`<=>-2x=2`
`<=>x=-1`
`c, 2x-(3-5x) = 4(x+3)`
`<=>2x-3+5x=4x+12`
`<=>2x+5x-4x=12+3`
`<=>3x=15`
`<=>x=5`
`d, 5-(6-x)=4(3-2x) `
`<=>5-6+x=12-8x`
`<=>x+8x=12-5+6`
`<=>9x=13`
`<=>x=13/9`
`e, 4(x+3)=-7x+17 `
`<=>4x+12=-7x+17`
`<=>4x+7x=17-12`
`<=>11x=5`
`<=>x=5/11`
`f, 5(x-3) - 4=2(x-1)+7`
`<=>5x-15-4=2x-2+7`
`<=>5x-2x=15+4-2+7`
`<=>3x=24`
`<=>x=8`
`g, 5(x-3)-4=2(x-1)+7 `
`<=>5x-15-4=2x-2+7`
`<=>5x-2x=15+4-2+7`
`<=>3x=24`
`<=>x=8`
`h,4(3x-2)-3(x-4)=7x+20`
`<=>12x-8-3x+12=7x+20`
`<=>12x-3x-7x=20+8+12`
`<=>2x=40`
`<=>x=20`
Đúng 3
Bình luận (0)
Bài 1: Giải các phương trình sau
a, x-53-x
b, 7-3x 9-x
c, 7x-8 4x+7
d, 2x+520-3x
e, 5y+128y+27
f, 13-2yy-2
g, 0,1x- 0,27x
Bài 2: Giải PT sau
a, 2x-(3-5x)4(x+3)
b, (x-2)2-x(x+5) 9
c, (x-3)(x+2)+ (5-x) (x-1) 0
d, x(4x-2)-( 2x+3)2 5
e,5-(x-6)4(3-2x)
Bài 3: Giải PT sau
a, (x-1)(3x+2)0
b, (2x+5)(x-2)0
c, (x+1)(x2+1)0
d, x(2x-9) 3x(x-5)
e, x(x-2)-x2+40
f, (x+3)2-2x-60
g,3x-153x(x-5)
h, (x2-2x+1)-40
i,x2-5x+60
j, ( 3x+1)(x2+2) (3x+1)(7x-10)
Giúp mình với
Mình cần gấp
Đọc tiếp
Bài 1: Giải các phương trình sau
a, x-5=3-x
b, 7-3x= 9-x
c, 7x-8= 4x+7
d, 2x+5=20-3x
e, 5y+12=8y+27
f, 13-2y=y-2
g, 0,1x- 0,27=x
Bài 2: Giải PT sau
a, 2x-(3-5x)=4(x+3)
b, (x-2)2-x(x+5)= 9
c, (x-3)(x+2)+ (5-x) (x-1)= 0
d, x(4x-2)-( 2x+3)2= 5
e,5-(x-6)=4(3-2x)
Bài 3: Giải PT sau
a, (x-1)(3x+2)=0
b, (2x+5)(x-2)=0
c, (x+1)(x2+1)=0
d, x(2x-9)= 3x(x-5)
e, x(x-2)-x2+4=0
f, (x+3)2-2x-6=0
g,3x-15=3x(x-5)
h, (x2-2x+1)-4=0
i,x2-5x+6=0
j, ( 3x+1)(x2+2)= (3x+1)(7x-10)
Giúp mình với
Mình cần gấp>>>
https://i.imgur.com/cGrmxY5.jpg
bài 1 : tìm x biết ;
a) 2x + 3 = 5 b)(2x - 3)2= 9 c)3x + 4 = 2x - 7 d)(4x - 1)3= 27 e) (x - 7) . 2 =3(2x +4) f) 52x-1= 125 g) 3.(x + 6) - 2x = 3 + 12x
Nếu bài dễ thì cố gắng tự làm bạn nhé.
Bài 1:
a) \(2x+3=5\)
\(\Leftrightarrow2x=5-3=2\)
\(\Leftrightarrow x=2:2=1\)
Vậy: x=1
b) \(\left(2x-3\right)^2=9\)\(=3^2=\left(-3\right)^2\)
\(\Rightarrow\left[{}\begin{matrix}2x-3=3\\2x-3=-3\end{matrix}\right.\)
\(\Leftrightarrow\left[{}\begin{matrix}x=\left(3+3\right):2=3\\x=\left(-3+3\right):2=0\end{matrix}\right.\)
Vậy: \(x\in\left\{3;0\right\}\)
c) \(3x+4=2x-7\)
\(\Leftrightarrow2x-3x=7+4\)
\(\Leftrightarrow-1x=11\)
\(\Leftrightarrow x=-11\)
Vậy: x=-11
d) \(\left(4x-1\right)^3=27\)\(=3^3\)
\(\Rightarrow4x-1=3\)
\(\Leftrightarrow4x=3+1=4\)
\(\Leftrightarrow x=4:4=1\)
Vậy: x=1
e) \(\left(x-7\right).2=3.\left(2x+4\right)\)
\(\Leftrightarrow2x-14=6x+12\)
\(\Leftrightarrow2x-6x=12+14\)
\(\Leftrightarrow-4x=26\)
\(\Leftrightarrow x=\frac{26}{-4}=\frac{13}{-2}\)
Vậy: \(x=\frac{13}{-2}\)
Đúng 0
Bình luận (5)
Tìm số tự nhiên x:
a) 3^10 . 3^2x -1 . 2^10 = 6^10 . 9^13 . 27
b) 5^3x - 2 . 125 =5^13. 125^5
c) 3^x+2 . 2^x= 9. 6^10
d) 3^x - 3^x = 26. 9^7