a) x = 1.           

b) x = 6.              

c)x = - ll.

\(210-\left(x+31\right)=-29\)

\(\Rightarrow\left(x+31\right)=210-\left(-29\right)\)

\(\Rightarrow x+31=239\)

\(\Rightarrow x=239-31=208\)

\(-\frac{5}{2}< \frac{3}{x}< \frac{2}{3}\)

Các số nguyên x thỏa mãn là: x \(\in\left\{5;6;......\right\}\)

a) x = 2.              

b) x = 6.              

c) x = -4.

558 - (15 : x + 29) x 17 = 14 

\(\Rightarrow\left(15:x+29\right)\times17=558-14\)

\(\Rightarrow\left(15:x+29\right)\times17=544\)

\(\Rightarrow15:x+29=544:17\)

\(\Rightarrow15:x+29=32\)

\(\Rightarrow15:x=32-29\)

\(\Rightarrow15:x=3\)

\(\Rightarrow x=15:3\)

\(\Rightarrow x=5\)

Vậy x = 5

\(\left(x+40\right)\times15=75\times24\)

\(\Rightarrow\left(x+40\right)\times15=1800\)

\(\Rightarrow x+40=1800:15\)

\(\Rightarrow x+40=120\)

\(\Rightarrow x=120-40\)

\(\Rightarrow x=80\)

Vậy x = 80

− 8 13 + 7 17 + 21 13 ≤ x ≤ − 9 14 + 3 + 5 − 14 ⇒ − 8 13 + 7 17 + 21 13 ≤ x ≤ − 9 14 + 3 + − 5 14 ⇒ − 8 13 + 21 13 + 7 17 ≤ x ≤ − 9 14 + − 5 14 + 3 ⇒ 1 + 7 17 ≤ x ≤ − 1 + 3 ⇒ 24 17 ≤ x ≤ 2 ⇒ 1 , 411... ≤ x ≤ 2 ⇒ x = 2

3.x + /-5/ = 14

   3.x + 5 = 14

         3.x = 14 -5

         3.x = 9

            x = 9 : 3

            x = 3

k cho mình

TRẢ LỜI

3x+/-5/=14

3x+5=14

3x=14-5

3x=9

x=9:3

x=2

vậy x=2

111111111111111111111111111111111111111111111111111111+111111111111111111111111111111111111111111=

GIUP MINH NHE

ta có

\(-\frac{5}{6}+\frac{8}{3}+\frac{29}{-6}=\frac{-5+16-29}{6}=-\frac{18}{6}=-3\)

\(-\frac{1}{2}+2+\frac{5}{2}=2+2=4\)

vì vậy \(-3< x< 4\Rightarrow x\in\left\{-2,-1,0,1,2,3\right\}\)

ai giúp tôi đi

\(\left(3x-5\right)⋮\left(x+2\right)\)

\(\Rightarrow3.\left(x+2\right)-11⋮\left(x+2\right)\)

Vì \(3.\left(x+2\right)⋮\left(x+2\right)\)

\(\Rightarrow11⋮\left(x+2\right)\)

\(\Rightarrow\left(x+2\right)\inƯ\left(11\right)=\left\{\pm1;\pm11\right\}\)

Tự lập bảng :) T lười qá

\(\left(x+30\right)\left(2y+1\right)=14\)

\(\Rightarrow\left(x+30\right)\left(2y+1\right)=1.14=14.1=2.7=7.2=\left(-1\right)\left(-14\right)=\left(-14\right)\left(-1\right)=\left(-2\right)\left(-7\right)=\left(-7\right)\left(-2\right)\)Tự lập bảng và tìm giá trị của x, y :)