Mk giải câu 1 nha

1) 2x - 3 = x + 1/2

➡️2x - x = 1/2 + 3

➡️x        = 7/2

Hok tốt~

x:5+1+3+5=135

x:5=135-5-3-1

x:5=126

x=126x5

x=630

chúc bạn học tốt

x:5+1+3+5=135

x:5+1+3=135-5=130

x:5+1=130-3=127

x:5=127-1=126

x:5=126

x=126:5

x=25,2

x:5+1+3+5=135

x:5+1+3=135-5

x:5+1+3=130

x:5+1=130-3

x:5+1=127

x:5=127-1

x:5=126

   x= 126x5

   x= 630

k mình nha

Chúc bạn học giỏi nhé

X : 5 + 1 + 3 + 5 = 135

X : 14                  = 135

X                         = 135 x 14

X                         = 1890

\(1,\Leftrightarrow5\left(x+3\right)=100\\ \Leftrightarrow x+3=20\\ \Leftrightarrow x=17\\ 2,\Leftrightarrow2\cdot3^{x+1}=3^{12}\cdot18\\ \Leftrightarrow2\cdot3^{x+1}=3^{12}\cdot2\cdot3^2=3^{14}\cdot2\\ \Leftrightarrow x+1=14\\ \Leftrightarrow x=13\\ 3,\Leftrightarrow\left[{}\begin{matrix}5x+4=14\\5x+4=-14\end{matrix}\right.\Leftrightarrow\left[{}\begin{matrix}x=2\\x=-\dfrac{18}{5}\end{matrix}\right.\)

\(\frac{4}{3}+\frac{x}{3}\text{ × }7=6\)

\(\frac{x}{3}\text{ × }7=6-\frac{4}{3}\)

\(\frac{x}{3}=\frac{14}{3}:7\)

\(\frac{x}{3}=\frac{2}{3}\)

\(\Leftrightarrow x=2\)

Các phần còn lại bạn làm tương tự nha 

x-5/5=135/45

x-5/5=15/5

=>x-5=15

x=15+5

x=20

a, \(\frac{4}{3}+\frac{x}{3}.7=6=>\frac{7x}{3}=6-\frac{4}{3}=>x=2\)

Vậy x =2

b, \(\frac{5}{x-1}=\frac{15}{18}=>\frac{x-1}{\left(5.18\right):15}=>x-1=6=>x=7\)

Vậy x =7

c,\(x-\frac{5}{5}=\frac{135}{45}=>x-1=3=>x=4\)

Vậy x =4

Chúc bạn học tốt

x : 5 + 1 +3 + 5 = 135

=> x : 5 + 9 = 135

=> x : 5 = 135 - 9

=> x :5 = 126

=> x = 126 x 5

=> x= 630

x=630

\(x:5+1+3+5=135\)

\(x:5=135-\left(1+3+5\right)\)

\(x:5=135-9\)

\(x:5=135-9\)

\(x:5=126\)

\(x=126.5\)

\(x=630\)

Hok giỏi nha!!!!!!!!!

a: 2x(x+1)-135=-200

=>2(x^2+x)=-65

=>2x^2+2x+65=0

=>x^2+x+32,5=0

=>x^2+x+0,25+32,25=0

=>(x+0,5)^2+32,25=0(vô lý)

b: 4x-5(x-1)+15=13

=>4x-5x+5=-2

=>5-x=-2

=>x=5+2=7

c: 2/3x-1/4=3/5-7/8

=>2/3x=3/5-7/8+1/4=24/40-35/40+10/40=-1/40

=>x=-1/40:2/3=-1/40*3/2=-3/80

d: 1/2(2x-3)+105/2=-137/2

=>1/2(2x-3)=-137/2-105/2=-242/2=-121

=>2x-3=-242

=>2x=-239

=>x=-239/2

a,234.4+234.5+234=234(4+5+1)=234.10=2340

b,135.16-135.2-135.4=135(16-4-2)=135.10=1350

c,1/2+1/4+1/8+1/16+1/32+1/64=1-1/2+1/2-1/4+1/4-1/8+1/8-1/16+1/16-1/32=1-1/32=31/32

a) 234 x4 + 234 x 5 + 234 = 234 x ( 1+4+5)=2340

b)135 x16 -135 x2 -4 x135 =135 x (16-2-4) =1350

a) 234.(4+5+1)=234.10=2340

b)135.(16-2-4)=135.10=1350