Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.
125. 4=500
a.125. 4 =500
=> (-125). 4= -500
b.125. 4=500
=> (-4). 125= -500
c.125. 4=500
=> 4. (-125) = -500
a) \(4^x+4^{x+1}=80\)
\(\Rightarrow4^x+4^x.4=80\)
\(\Rightarrow4^x.\left(1+4\right)=80\)
\(\Rightarrow4^x.5=80\)
\(\Rightarrow4^x=16\)
\(\Rightarrow4^x=4^2\)
\(\Rightarrow x=2\)
Vậy x = 2
a, \(x\) \(\times\) \(\dfrac{1}{2}\) - \(\dfrac{3}{4}\) = \(\dfrac{5}{6}\)
\(x\) \(\times\) \(\dfrac{1}{2}\) = \(\dfrac{5}{6}\) + \(\dfrac{3}{4}\)
\(x\) \(\times\) \(\dfrac{1}{2}\) = \(\dfrac{19}{12}\)
\(x\) = \(\dfrac{19}{12}\) : \(\dfrac{1}{2}\)
\(x\) = \(\dfrac{19}{6}\)
b, \(x\) : \(\dfrac{1}{2}\) - \(\dfrac{3}{4}\) = \(\dfrac{5}{6}\)
\(x\): \(\dfrac{1}{2}\) = \(\dfrac{5}{6}\) + \(\dfrac{3}{4}\)
\(x\) : \(\dfrac{1}{2}\) = \(\dfrac{19}{12}\)
\(x\) = \(\dfrac{19}{12}\) \(\times\) \(\dfrac{1}{2}\)
\(x\) = \(\dfrac{19}{24}\)
c, \(x\) \(\times\) \(\dfrac{3}{4}\) + \(x\) \(\times\) \(\dfrac{1}{4}\) = \(\dfrac{7}{8}\)
\(x\) \(\times\) ( \(\dfrac{3}{4}\) + \(\dfrac{1}{4}\)) = \(\dfrac{7}{8}\)
\(x\) \(\times\) 1 = \(\dfrac{7}{8}\)
\(x\) = \(\dfrac{7}{8}\)
d, \(x\times\) \(\dfrac{3}{4}\) - \(x\) \(\times\) \(\dfrac{1}{4}\) = \(\dfrac{7}{8}\)
\(x\) \(\times\) ( \(\dfrac{3}{4}\) - \(\dfrac{1}{4}\)) = \(\dfrac{7}{8}\)
\(x\) \(\times\) \(\dfrac{1}{2}\) = \(\dfrac{7}{8}\)
\(x\) = \(\dfrac{7}{8}\) : \(\dfrac{1}{2}\)
\(x\) = \(\dfrac{7}{4}\)
a) (x-1).(x+2)=0
=> +)x-1=0=>x=1
+)x+2=0=>x=-2
vậy x thuộc {1;-2)
b) (x+4).(4-x)=0
suy ra: +) x+4=0=>x=-4
+)4-x=0=>x=4
vậy x thuộc {-4;4}
c) (x+4)(-3x+9)=0
suy ra : +) x+4= 0=>x=-4
+)-3x+9=0=>x=3
vậy x thuộc {-4;3)
d) (2x-4)(x+3)=0
suy ra : +) 2x-4=0=>x=2
+)x+3=0=>x=-3
vậy x thuộc {2;-3}
e) (x2-9).(2x+10)=0
suy ra : +) x2-9=0=>x=9/2
+) 2x+10=0=>x=-5
Vậy x thuộc {9/2;-5}
g) (4-x).x2=0
suy ra : +)4-x=0 => x=4
+) x.2=0=> x=0
Vậy x thuộc {4;0}
HT
a: =>4x-4-3x+6=-5
=>x+2=-5
=>x=-7
b: =>\(-4x-4+8x-24=24\)
=>4x-28=24
=>4x=52
=>x=13
c: \(\Leftrightarrow12x-48+6x-12-16x-48=7\cdot4=28\)
=>2x-108=28
=>2x=136
=>x=68
d: =>2|x-6|=2
=>|x-6|=1
=>x=7 hoặc x=5
e: =>|x+2|=20-6x+6x-24=-4(loại)
x + 8432 : 4 = 15528
x + 2108 = 15528
x = 15528 - 2108
x = 13420
Chúc bạn học thật tốt !
x+2108=15528
x = 15528-2108
x = 13420