=41/10

x - 1/2 = 18/5

x = 18/5 + 1/2

x = 41/10

x+1/3+x+14/43+x+1/19+x+26=0

4x+65470/2451=0

4x=-65470/2451

x=-32735/4902

\(\left|x-3y\right|5+\left|y+4\right|=0\)

\(\Leftrightarrow\left\{\begin{matrix}x-3y=0\\y+4=0\end{matrix}\right.\)\(\Leftrightarrow\left\{\begin{matrix}x=3y\\y=-4\end{matrix}\right.\)\(\Leftrightarrow\left\{\begin{matrix}x=-12\\y=-4\end{matrix}\right.\)

Vậy....

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\(\left|x+3y-1\right|+3\left|y+2\right|=0\)

\(\Leftrightarrow\left\{\begin{matrix}x+3y-1=0\\y+2=0\end{matrix}\right.\)\(\Leftrightarrow\left\{\begin{matrix}x=1-3y\\y=-2\end{matrix}\right.\)\(\Leftrightarrow\left\{\begin{matrix}x=7\\y=-2\end{matrix}\right.\)

Vậy .....

1,a)\(\left|x-3y\right|\)\(\ge\)0 => \(\left|x-3y\right|\).5 \(\ge\)0

\(\left|y+4\right|\)\(\ge\)0

Mà \(\left|x-3y\right|\)5+\(\left|y+4\right|\)=0

=> \(\left|y+4\right|\)=0 => y=-4

=> \(\left|x-3y\right|\)=0 => \(\left|x-3.-4\right|\)=0 => x= -12

Câu b làm tương tự.

Tick cho chụy nha!

j: (2x-1)(3x+1)-(4-3x)(3-2x)=3

=>(2x-1)(3x+1)-(3x-4)(2x-3)=3

=>\(6x^2+2x-3x-1-\left(6x^2-9x-8x+12\right)=3\)

=>\(6x^2-x-1-\left(6x^2-17x+12\right)=3\)

=>\(6x^2-x-1-6x^2+17x-12=3\)

=>16x-13=3

=>16x=16

=>x=1

k: \(\left(2x+1\right)\left(x+3\right)-\left(x-5\right)\left(2x+7\right)=8\)

=>\(2x^2+6x+x+3-\left(2x^2+7x-10x-35\right)=8\)

=>\(2x^2+7x+3-2x^2-7x+10x+35=8\)

=>10x+38=8

=>10x=-30

=>x=-3

m: 2(3x-1)(2x+5)-6(2x-1)(x+2)=-6

=>\(2\left(6x^2+15x-2x-5\right)-6\left(2x^2+4x-x-2\right)=-6\)

=>\(2\left(6x^2+13x-5\right)-6\left(2x^2+3x-2\right)=-6\)

=>\(12x^2+26x-10-12x^2-18x+12=-6\)

=>8x+2=-6

=>8x=-8

=>x=-1

k hộ mik nha alan walker ngầu lol

Ta có :\(\frac{x-5}{4}=\frac{-9}{5-x}\)

\(\Rightarrow\frac{x-5}{4}=\frac{\left(-9\right).\left(-1\right)}{\left(5-x\right).\left(-1\right)}\)

\(\Rightarrow\frac{x-5}{4}=\frac{9}{x-5}\)

=>(x-5).(x-5)=9.4

\(\Rightarrow\left(x-5\right)^2=36\)

\(\Rightarrow\orbr{\begin{cases}x-5=6\\x-5=-6\end{cases}}\)         \(\Rightarrow\orbr{\begin{cases}x=11\\x=-1\end{cases}}\)

Vậy \(x=\left(11;-1\right)\)

G = { x ∈ N/ x ⋮ 18 và 180 ⋮ x / x = 18,36,90,180 }

Cảm ơn nhe

Ta có: \(5.\left|x\right|=\left|-2017\right|+\left|13\right|\)

          \(5.\left|x\right|=2017+13\)

         \(5.\left|x\right|=2030\)

             \(\left|x\right|=406\)

\(\Rightarrow x\in\left\{-406;406\right\}\)

Sắp thi rùi, chúc bn hok "tuốt" nha^^

x + xx + 5 = 125

x + xx = 125 - 5

x + xx = 120

x + x * 11 = 120

x * ( 11 + 1 ) = 120

x * 12 = 120

x = 120 : 12

x= 10

Vậy x = 10

x + xx + 5 = 125

x + xx = 125 - 5

x + xx = 120

x + X x 2 = 120

X x 3 = 120

      X = 120 : 3

      X = 40