Tìm đa thức b biết
B-(3\(x^6\)-4\(xy^5\)+\(\dfrac{1}{3}\)\(xy^2\)-\(\dfrac{3}{2}\))=(7\(x^6\)-\(\dfrac{1}{2}xy^5-xy^2-\dfrac{1}{3}\))
1/Thực hiện phép tính:
𝒂) ( \(\dfrac{7}{5}\) − \(\dfrac{8}{7}\) ) + \(3\dfrac{2}{5}\) ∶ 𝟎,𝟔
b) \(\dfrac{11}{6}\) + \(\dfrac{7}{6}\) ∶ \(\dfrac{-5}{4}\)
c) \(\dfrac{7}{4}\) − \(\dfrac{5}{4}\) . \(\dfrac{8}{15}\)
2/ Tìm x biết
b) 𝒙 + 𝟐,𝟓 = \(\dfrac{-8}{3}\)
b) 𝟐𝒙 − 𝟐𝟎% = \(\dfrac{9}{5}\)
𝒄) ( \(\dfrac{5}{4}\) )2 + 𝒙 = \(2\dfrac{3}{4}\)
Bài toán 2: Tìm x, y biết
b) 3x=7y và x-y=-16
\(\dfrac{x-3}{3}=\dfrac{2x+1}{5}\)
\(\dfrac{x+1}{22}=\dfrac{6}{x}\)
\(\dfrac{2x-1}{2}=\dfrac{5}{x}\)
\(\dfrac{2x-1}{21}=\dfrac{3}{2x+1}\)
\(\dfrac{2x+1}{9}=\dfrac{5}{x+1}\)
Tìm x
tìm x biết:-7.(x+9)-3.(5-x)=2
b)3. (x+2) -6.(x-5)=2.(5-2x)
Tìm x biết : a) 2x+3/15 = 7/5. b) x-2/9 = 8/3. c) -8/x = -x/18 d) 2x+3/6 = x-2/5. e) x+1/22 = 6/x f) 2x-1/2 = 5/x g) 2x-1/21 = 3/2x+1 h) 10x+5/6 = 5/x+1
Tìm X
a. | x - 3 | + | x + 5 | = 8
b. | x - 2 | + | x - 5 | = 3
c. | x + 6 | - 9 = 2x
d. | 2x - 3 | + x = 21
Tìm x,biết :
a) (x+5)3=-64 b) (2x-3)2=9
Tìm x, biết:a,x/4/2=4/x/2;b,x^4=y^4;x^5=y^5;(x+5)^3=-64;e,(2x-3)^2=9
9. Tìm x, y biết.
a) |x-2|+|2x+y|≤0
b) |x-2|+|x-5|≤3