-11/12 x X + 0,25 = 5/6
-11/12.x+0,25=5/6
tìm x
\(\dfrac{-11}{12}.x+0,25=\dfrac{5}{6}\)
\(\dfrac{-11}{12}.x+0,25=\dfrac{5}{6}\)
\(\Rightarrow\dfrac{-11}{12}.x=\dfrac{5}{6}-0,25\)
\(\Rightarrow\dfrac{-11}{12}.x=\dfrac{7}{12}\)
\(\Rightarrow x=\dfrac{7}{12}:\dfrac{-11}{12}\)
\(\Rightarrow x=\dfrac{-7}{11}\)
Vậy...........
-11/12.x+0.25=5/6 (1)
<=> -11/12.x=5/6-0.25
<=>-11/12.x=7/12
<=>x= 7/12:(-11/12)
<=>x=84/-132=
Vậy nghiệm của phương trình (1) là:
S={-7/11}
a)-11/12.x+0,25=5/6
b)(x-1)=-32
c)3-2.x-3=-3
like người nhanh nhất
a) -11/12 x X+ 0,25=5
b) (x-1)5=-32
a)\(\frac{-11}{12}.x+0,25=5\)
\(\Rightarrow-\frac{11}{12}.x=5-0,25=\frac{19}{4}\)
\(\Rightarrow-\frac{11}{12}.x=\frac{19}{4}\)
\(\Rightarrow x=\frac{-57}{11}\)
b)\(\left(x-1\right)^5=-32=-2^5\)
\(\Rightarrow\left(x-1\right)=-2\)
\(\Rightarrow x=-2+1=-1\)
a ) - 11 / 12 x X + 0 , 25 = 5
- 11 / 12 x X = 4 , 75
X = - 57 / 11
b ) ( x - 1 ) 5 = -32
( x - 1 ) 5 = ( - 2 ) 5
=> x - 1 = - 2
x = -2 + 1
x = -1
9 - 3 x ( X - 9 ) = 6
4 + 6 x ( X + 1 ) 70
\(\dfrac{X}{13}+\dfrac{15}{26}=\dfrac{46}{52}\)
\(\dfrac{11}{14}-\dfrac{3}{X}=\dfrac{5}{14}\)
5 x ( 3 + 7 x X ) = 40
X x 6 + 12 : 3 = 120
X x 3,7 + X x 6,3 = 120
( 15 x 24 - X ) : 0,25 = 100 : \(\dfrac{1}{4}\)
71 + 65 x 4 = \(\dfrac{X+140}{X}\)+ 260
( X +1 ) + ( X + 4 ) + ( x + 7 ) + ...... + (X + 28 ) = 155
đây là bài tìm X
Giải:
\(9-3\times\left(x-9\right)=6\)
\(3\times\left(x-9\right)=9-6\)
\(3\times\left(x-9\right)=3\)
\(x-9=3:3\)
\(x-9=1\)
\(x=1+9\)
\(x=10\)
\(4+6\times\left(x+1\right)=70\)
\(6\times\left(x+1\right)=70-4\)
\(6\times\left(x+1\right)=66\)
\(x+1=66:6\)
\(x+1=11\)
\(x=11-1\)
\(x=10\)
\(\dfrac{x}{13}+\dfrac{15}{26}=\dfrac{46}{52}\)
\(\dfrac{x}{13}=\dfrac{23}{26}-\dfrac{15}{26}\)
\(\dfrac{x}{13}=\dfrac{4}{13}\)
\(\Rightarrow x=4\)
\(\dfrac{11}{14}-\dfrac{3}{x}=\dfrac{5}{14}\)
\(\dfrac{3}{x}=\dfrac{11}{14}-\dfrac{5}{14}\)
\(\dfrac{3}{x}=\dfrac{3}{7}\)
\(\Rightarrow x=7\)
\(5\times\left(3+7\times x\right)=40\)
\(3+7\times x=40:5\)
\(3+7\times x=8\)
\(7\times x=8-3\)
\(7\times x=5\)
\(x=5:7\)
\(x=\dfrac{5}{7}\)
\(x\times6+12:3=120\)
\(x\times6+4=120\)
\(x\times6=120-4\)
\(x\times6=116\)
\(x=116:6\)
\(x=\dfrac{58}{3}\)
\(x\times3,7+x\times6,3=120\)
\(x\times\left(3,7+6,3\right)=120\)
\(x\times10=120\)
\(x=120:10\)
\(x=12\)
\(\left(15\times24-x\right):0,25=100:\dfrac{1}{4}\)
\(\left(360-x\right):0,25=400\)
\(360-x=400.0,25\)
\(360-x=100\)
\(x=360-100\)
\(x=260\)
\(71+65\times4=\dfrac{x+140}{x}+260\)
\(\left(x+140\right):x+260=71+260\)
\(x:x+140:x+260=331\)
\(1+140:x+260=331\)
\(140:x=331-1-260\)
\(140:x=70\)
\(x=140:70\)
\(x=2\)
\(\left(x+1\right)+\left(x+4\right)+\left(x+7\right)+...+\left(x+28\right)=155\)
\(10\times x+\left(1+4+7+...+28\right)=155\)
Số số hạng \(\left(1+4+7+...+28\right)\) :
\(\left(28-1\right):3+1=10\)
Tổng dãy \(\left(1+4+7+...+28\right)\) :
\(\left(1+28\right).10:2=145\)
\(\Rightarrow10\times x+145=155\)
\(10\times x=155-145\)
\(10\times x=10\)
\(x=10:10\)
\(x=1\)
Đều theo cách lớp 5 nha em!
1) 3y/5=21/10
2) -11/12.y+0,25=6/5
3) 5x/4=-3/2
4) 8:(1/4.x)=2 : 0,02
Tìm x, biết
a. x + \(\dfrac{3}{10}=\dfrac{-2}{15}\)
b. \(\dfrac{-11}{12}x+0,25=\dfrac{5}{6}\)
c. x + (x+1)+(x+2)+........................+(x+2002)=2004
a. \(x=\dfrac{-2}{15}-\dfrac{3}{10}\)
\(x=\dfrac{-13}{30}\)
b. \(\dfrac{-11}{12}x+\dfrac{1}{4}=\dfrac{5}{6}\)
\(\dfrac{-11}{12}x=\dfrac{5}{6}-\dfrac{1}{4}\)
\(\dfrac{-11}{12}x=\dfrac{7}{12}\)
\(x=\dfrac{7}{12}:\dfrac{-11}{12}\)
\(x=\dfrac{-7}{11}\)
c:=>2003x+2005003=2004
=>2003x=-2002999
hay \(x\in\varnothing\)
Tìm x :
a) 11/4 . x = 22/7 :0,01
b) x : 1/3 = 12/99 : 15/90
c) 4/9 : x = 10/3 : 2,25
d) 0,25.x : 3 = 5/6 : 0,125
a) x=800/7
b) x=8/33
c) x= 3/10
d) x=80
100 % đúng hết
Tính nhanh :
2, 5 * 8, 7 + 7, 5 * 8, 7 = ?
86 * 5 + 86 * 4 + 86 = ?
123,45 + 23,56 + 76,44 + 54,55 = ?
456 x 45 + 456 x 10 – 456 x 55 = ?
25 x 8 x 17 x 50 = ?
(12 x 2 + 12 x 4 – 12 x 6) : (2 + 4 +…….+12 + 14) = ?
(1+3+5+7+9+11+13+15) : (32 x 2) = ?
(24 x 6 + 4 x 24) : (49 – 24 x 2) = ?
(1+2+3+…..+98+99+100) : 5050 = ?
35 x 11 x 0,1 x 0,25 x 100 x (3 : 0,4 – 7,5) = ?
ai giải nhanh và đúng nhất m k cho, trình bày ra nhé
123,45 + 23,56 +76,44 + 54,55
= (123,45 + 54,55) + (23,56 + 76,44)
= 178 + 100
= 278
456 x 45 + 456 x 10 + - 456 x 55
=456 x (45 +10-55)
=456 x 0
=0
2,5 x 8,5 + 7,5 x 8,5
=8,5 x (2,5 +7,5)
= 8,5 x 10
= 85
86 x 5 + 86 x 4 + 86
= 86 x (5+4+1)
= 86 x10
860
25 x 8 x 17 x 50
= 50 x 4 x 17 x 50
= 200 x 17 x 50
= 200 x 50 x 17
= 10000 x 17
= 170000
(12 x 2 + 12 x 4 - 12 x 6 ) : ( 2 + 4 + 6 +... + 12 +14)
=(12 x (2 + 4 - 6) ) : ( 2 + 4 + 6 + ... + 12 + 14 )
= (12 x 0 ) : (2 + 4 + 6 + ... + 12 + 14 )
=0 : ( 2 + 4 + 6 + ... + 12 + 14)
= 0