\(\left(\frac{4}{5}:\frac{6}{5}+\frac{1}{5}:\frac{1}{x}\right)\cdot30-26=54\)
\(\left(\frac{4}{5}\cdot\frac{5}{6}+\frac{1}{5}\cdot x\right)\cdot30=80\)
\(\frac{2}{3}+\frac{1}{5}\cdot x=\frac{8}{3}\)
\(\frac{1}{5}x=\frac{5}{3}\)
\(x=\frac{25}{3}\)
\(\left(\frac{4}{5}:\frac{6}{5}+\frac{1}{5}:\frac{1}{x}\right)\cdot30-26=54\)
\(\left(\frac{4}{5}\cdot\frac{5}{6}+\frac{1}{5}\cdot x\right)\cdot30=80\)
\(\frac{2}{3}+\frac{1}{5}\cdot x=\frac{8}{3}\)
\(\frac{1}{5}x=\frac{5}{3}\)
\(x=\frac{25}{3}\)
{4/5 chia 6/5 + 1/5 chia 1/2] nhân 30 - 26 =54
Tính giá trị của các biểu thức sau :
a.15 + 27 + 39 + 85 + 73
b. 54 .36 + 54 . 27 + 54 . 37
c.168 - 37 : 34 + 20130
đ. 34 . 15 + 81 . 26 + 27 . 59 . 3
(x+1/5)2 + 17/25=26/25
x+2/ 327+ x+3/326+x+4/325+x+5/324+x+349/5=0
câu 1:(26-3x):5+71=75
câu 2:5^x+1=125
câu 3:B={xϵN/30<x lớn hơn bằng 40}
câu 4:100-7.(5-x)=58
b) 1500.(x – 7) = 0
c) (2.x – 4).(48 – 12.x) = 0
d) (x + 12).(x – 1) =0
Bài 2: Tìm x biết:
a) 128- 3(x+ 4) = 23
b) [(14x+ 26). 3+ 55]: 5= 35
d) 720: [41- (2x- 5)]= 23. 5
Tìm X :
1) 4 ( 2X - 1 ) \(^2\) - 10 = 54
2) 5 . ( 3 \(^{2X-1}\) + 30 ) = 165
Tìm x thuộc Z
A, ( x -5 ) × ( x + 2) =0
B, 26 × ( 2x +4 ) × ( x -1) =0
C, ( x^2 -9 )× ( x^2 -25 ) < 0
tìm x biết
\(\left(\dfrac{1}{26}+\dfrac{1}{27}+...+\dfrac{1}{50}\right):x=\dfrac{99}{50}-\dfrac{97}{49}+...+\dfrac{7}{4}-\dfrac{5}{3}+\dfrac{3}{2}-1\)