Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.
mk ko viết đề nha:
a)=(1/2+1/2)+ (1/3+2/3)+(1/4 +3/4)+(1/5+4/5)
=(2/2 + 3/3) + (4/4 + 5/5)
=2/2 + 4/2
=6/4
À mik lm đc câu a thui nha!Nhưng k cho mik vs nhé!
a, x + 0 = 0
=> x = 0
Vậy x = 0
b, x(x - 1) = 0
=> x = 0 hoặc x - 1 = 0
=> x = 0 hoặc x = 1
Vậy x thuộc { 0 ; 1}
c, x + 5 = 0
x = 0 - 5
x = -5
Vậy x = -5
(1-1/2)×(1-1/3)×(1-1/4)×(1-1/5)×1-1/6=1/2×2/3×3/4×4/5×5/6=1/6
\(x-\frac{1}{4}=\frac{3}{5}\)
\(x=\frac{3}{5}+\frac{1}{4}\)
\(x=\frac{12}{20}+\frac{5}{20}\)
\(x=\frac{17}{20}\)
\(x:\frac{2}{3}=\frac{1}{2}\)
\(x=\frac{1}{2}.\frac{2}{3}\)
\(x=\frac{1}{3}\)
Hok tốt
\(x-\frac{1}{4}=\frac{3}{5}\)
\(x\) \(=\frac{3}{5}+\frac{1}{4}\)
\(x\) \(=\frac{12}{20}+\frac{5}{20}\)
\(x\) \(=\frac{17}{20}\)
\(x:\frac{2}{3}=\frac{1}{2}\)
\(x\) \(=\frac{1}{2}x\frac{2}{3}\)
\(x\) \(=\frac{2}{6}\)rút gọn \(\frac{1}{3}\)
Tìm x :
x + 1/3 = 4/5
x = 4/5 - 1/3
x = 12/15 - 5/15
x = 7/15
x - 1/2 = 2/7
x = 2/7 + 1/2
x = 4/14 + 7/14
x = 11/14
4/7 × x = 1/3
x = 1/3 : 4/7
x = 1/3 × 7/4
x = 7/12
x : 2/5 = 2/9
x = 2/9 × 2/5
x = 4/45
20 × 7 : ( 5 × x - 3 × 5 ) = 4
140 : 5 × ( x - 3 ) = 4
5 × ( x - 3 ) = 140 : 4
5 × ( x - 3 ) = 35
x - 3 = 35 : 5
x - 3 = 7
x = 7 + 3
x = 10
x - 270 = 420 : 105
x - 270 = 4
x = 4 + 270
x = 274
x - 140 : 35 = 270
x - 4 = 270
x = 270 + 4
x = 274
x + 1/3 = 4/5
x = 4/5 - 1/3
x = 7/15
x - 1/2 = 2/7
x = 2/7 + 1/2
x = 11/14
4/7 * x = 1/3
x = 1/3 : 4/7
x = 7/12
x : 2/5 = 2/9
x = 2/9 * 2/5
x 4 / 45
20 * 7 : ( 5*x - 3 * 5) =4
= 140 :(5*x -3 *5) =4
5*x- 3*5 = 140 : 4
5*x - 3 * 5 = 35
5* x = 35 + 3 * 5
5 * x = 50
x = 50 : 5
x = 10
x - 270 = 402 : 105
x - 270 = 4
x = 270 + 4
x = 274
x- 140 : 35 = 270
x - 4 = 270
x = 270 + 4
x = 274
\(x-\dfrac{1}{5}=\dfrac{2}{5}+\dfrac{1}{3}=\dfrac{11}{15}\)
\(x=\dfrac{11}{15}+\dfrac{1}{5}=\dfrac{14}{15}\)
x-1/5=11/15
x =11/15+1/5
x =14/15 :v
HT