\(2^{3+x}+2^x=576\)

\(\Rightarrow2^x\cdot2^3+2^x=576\)

\(\Rightarrow2^x\cdot\left(2^3+1\right)=576\)

\(\Rightarrow2^x\cdot\left(8+1\right)=576\)

\(\Rightarrow2^x\cdot9=576\)

\(\Rightarrow2^x=576:9\)

\(\Rightarrow2^x=64\)

\(\Rightarrow2^x=2^6\)

\(\Rightarrow x=6\)

Vậy $x=6$.

\(2^{3+x}+2^x=576.\)

\(2^3.2^x+2^x.1=576\)

\(2^x.\left(2^3+1\right)=576\)

\(2^x.9=576\)

\(2^x=576:9\)

\(2^x=64\)

\(2^x=2^6\)

\(\Rightarrow x=6\)

giúp em với ạ  em đang cần gấp ạ . Cảm ơn !

phải nói rỏ x,y E N hay x,y E Z mới biết trả lời chứ

17.[29 - (-111) + 29.(-17)]

= 17.[29 + 111 + 29.(-17)]

= 17.[29 + 111 + (-493)

= 17.[140 + (-493)]

= 17.(-353)

= -6001.

53 . 2 - 100 : 4 + 23 . 5

= 106 - 25 + 115

= 106 + (115 - 25)

= 106 + 90

= 196

5³.2 - 100 : 4 + 2³.5

= 125.2 - 25 + 8.5

= 250 - 25 + 40

= 225 + 40

= 265

$0,1+0,3+\dots+0,9+1,1$

$=0,1+0,3+0,5+0,7+0,9+1,1$

$=(0,1+0,9)+(0,3+0,7)+(0,5+1,1)$

$=1+1+1,6$

$=2+1,6=3,6$

\(0,1+0,3+...+0,9+0,11\)

\(=0,1+0,3+0,5+0,7+0,9+0,11\)

\(=\left(0,1+0,9\right)+\left(0,3+0,7\right)+\left(0,5+0,11\right)\)

\(=1+1+0,61\)

\(=2,61\)

5 x [(85 - 35 : 7) : 8 + 90] - 50

= 5 x [(85 - 5) : 8 + 90] - 50

= 5 x [80 : 8 + 90] - 50

= 5 x [10 + 90] - 50

= 5 x 100 - 50

= 500 - 50

= 450

\(5\times\left[\left(85-35:7\right):8+90\right]-50\\ =5\times\left[\left(85-5\right):8+90\right]-50\\ =5\times\left[80:8+90\right]-50\\ =5\times\left[10+90\right]-50\\ =5\times100-50\\ =500-50=450\)

ai giúp mình bài 14 được ko

\(\left(-35\right):63=-15:x\\ \dfrac{-35}{63}=\dfrac{-15}{x}\\ x=\dfrac{-15.63}{-35}=\dfrac{3.\left(-5\right).7.9}{-35}=\dfrac{3.\left(-35\right).9}{-35}=3.9=27\)

(-35) : 63 = -15 : \(x\)

\(x\) = (-15) : [ (-35) : 63]

\(x\) = -15 x \(\dfrac{63}{-35}\)

\(x\) = 27

\(23.18+18.\left(-23\right)\)

\(=23.18+\left(-18\right).23\)

\(=23.\left(-18+18\right)\)

\(=23.0=0\)

23.18 + 18.(-23)

= 23.18 - 23.18

= 0

\(1125-\left(374+1125\right)+\left(-65+374\right)\)

\(=1125-374-1125+\left(-65\right)+374\)

\(=1125-1125+374-374+\left(-65\right)\)

\(=0+0+\left(-65\right)=-65\)

ngoặc trước nhé