18-(x+14):3=27

(x+14):3=18-27

(x+14):3= -9

(x+14)= -9 nhân 3

x+14= -27

x= -27 -14

x= -41

= 4/3 x 6/5 + 3/10

= 8/5 +3/10

= 19/10

cám ơn nha

k mik nha

  3. (-8) - (-15)

= (-24) - (-15)

= -9

(-2)^3 + 14 : (-7)
= (-2)^3 + (-2)

= (-8) + (-2)

= -10

c) 4. (12-27) - 3.(-18)

= 4. (-15) - 3.(-18)

= -60 - 3.(-18)

= -60 - 54

= -6

giúp mik với mn ơi , mik cần gấp , ai trả lời đúng mik k đúng cho nhé , thank mn nhìu 

bùi thùy an , cảm ơn nha 

A. x = 2

B. \(\dfrac{3}{8}=\dfrac{6}{x}\)\(\Leftrightarrow x=\dfrac{6.8}{3}=16\)

C. x = 3

D. \(x=\dfrac{4.6}{8}=3\)

E. \(x=\dfrac{7}{3}\)

G.\(\dfrac{14}{13}=\dfrac{28}{10-x}\)

<=>\(14\left(10-x\right)=364\)

<=> 10 - x = 26 

<=> x = -16 

H. \(3\left(x+2\right)=4\left(x-5\right)\)

<=> 3x + 6  = 4x - 20 

<=> -x = -26

<=> x = 26

K. \(\dfrac{x}{2}=\dfrac{8}{x}\)

<=> \(x^2=16\)

<=> \(\left[{}\begin{matrix}x=4\\x=-4\end{matrix}\right.\)

M. \(\left(x-2\right)^2=100\)

<=> \(\left[{}\begin{matrix}x-2=10\\x-2=-10\end{matrix}\right.\)

\(\Leftrightarrow\left[{}\begin{matrix}x=12\\x=-8\end{matrix}\right.\)

a=2

b=16

c=3

d=3

mik chỉ biết thế này thôi(ko chắc đúng=3)

A, \(\dfrac{x}{5}=\dfrac{2}{5}\Rightarrow x=2\)

B,\(\dfrac{3}{8}=\dfrac{6}{x};\dfrac{3}{8}=\dfrac{3\cdot2}{8\cdot2}=\dfrac{6}{16}\Rightarrow x=16\)

C,\(\dfrac{1}{9}=\dfrac{x}{27};\dfrac{1}{9}=\dfrac{1\cdot3}{9\cdot3}=\dfrac{3}{27}\Rightarrow x=3\)

D,\(\dfrac{4}{x}=\dfrac{8}{6};\dfrac{4}{x}=\dfrac{4\cdot2}{x\cdot2}=\dfrac{8}{2x}\)

   \(\Rightarrow2x=6;6=x:2;x=3\)

a)x=39,b)x=-53,c)x=-102,d)x=3,e)x=-61

a: 3y-18=26+(-14)

=>3y-18=26-14=12

=>3y=30

=>y=30/3=10

b: \(51-\left(-12+3y\right)=27\)

=>\(51-3y+12=27\)

=>63-3y=27

=>3y=63-27=36

=>y=36/3=12

c: \(50-\left(14-3y\right)=3^3\cdot3\)

=>\(50+3y-14=81\)

=>3y+36=81

=>3y=81-36=45

=>y=45/3=15

a: 3y-18=26+(-14)

=>3y-18=26-14=12

=>3y=30

=>y=30/3=10

b: 

=>

=>63-3y=27

=>3y=63-27=36

=>y=36/3=12

c: 

=>

=>3y+36=81

=>3y=81-36=45

=>y=45/3=15