a) x=11

b) x=9

\(5\frac{4}{9}+x-7\frac{7}{18}=15\frac{3}{4}\)

\(\frac{49}{9}+x-\frac{133}{18}=\frac{63}{4}\)

\(\frac{49}{9}+x=\frac{833}{36}\)

\(x=\frac{637}{36}\)

(x-34).15=0

=>x-34=0

x=0+34

x=34

18.(x-16)=18

x-16=18:18

x-16=1

x=1+16

x=17

( x - 34 ) . 15 = 0

x - 34            = 0 ; 15 ( coi x - 34 là thừa số )

x - 34           = 0

x                 = 0 + 34

x                 = 34

18. ( x - 16 ) = 18

       x - 16   =18 : 18

       x - 16   = 1

       x          = 16 + 1

       x          = 17

\(\frac{x+1}{18}+\frac{x+2}{17}=\frac{x+5}{14}+\frac{x+4}{15}\)

\(\Rightarrow\frac{x+1}{18}+1+\frac{x+2}{17}+1=\frac{x+5}{14}+1+\frac{x+4}{15}+1\)

\(\Rightarrow\frac{x+1}{18}+\frac{18}{18}+\frac{x+2}{17}+\frac{17}{17}=\frac{x+5}{14}+\frac{14}{14}+\frac{x+4}{15}+\frac{15}{15}\)

\(\Rightarrow\frac{x+19}{18}+\frac{x+19}{17}=\frac{x+19}{14}+\frac{x+19}{15}\)

\(\Rightarrow\frac{x+19}{18}+\frac{x+19}{17}-\frac{x+19}{14}-\frac{x+19}{15}=0\)

\(\Rightarrow\left(x+19\right).\left(\frac{1}{18}+\frac{1}{17}-\frac{1}{14}-\frac{1}{15}\right)=0\)

\(\text{Mà }\left(\frac{1}{18}+\frac{1}{17}-\frac{1}{14}-\frac{1}{15}\right)\ne0\text{ nên: }x+19=0\Rightarrow x=-19\)

dễ thương quá minion 

d, X/8*32+X/3*18-X/5*10=120

   X*32/8+X*18/3-X*10/5=120

  32X/8+18X/3-10X/5=120

  4X+6X-2X=120

  8X=120

 X=120/8

X=15

a, ( 25 * 12 - X - 25 ) : 25 = 4

( 25 * 12 - x - 25 )           = 4 * 25 

( 25 * 12 - x - 25 )           = 100

300 - x - 25                    = 100

300 - x                           = 100 + 25

300 - x                           = 125

x                                   = 300 - 125

x                                   = 175

a)15/8+3/4-5/12

=45+18-10/24

=53/24

b)11/24.12/33+5/6

=11.12/12.2.11.3+5/6

=1/6+5/6

=6/6=1

c)15/8+7/24:5/8

=15/8+7/24.8/5

=15/8+7.8/3.8.5

=15/8+7/15

=đề sai, nếu đúng thì như này

=8/15+7/15

=15/15=1

hbhvgvvggvgbhhgvbnj

\(\left(x-34\right)\cdot15=0\)

\(\Leftrightarrow x-34=0\)

\(\Leftrightarrow x=34\)

a)\(\left(x-34\right).15=0\Leftrightarrow x-34=0\Leftrightarrow x=34\)

b)\(18\left(x-16\right)=18\Leftrightarrow x-16=1\Leftrightarrow x=17\)

\(18\left(x-16\right)=18\)

\(\Leftrightarrow x-16=1\)

\(\Leftrightarrow x=17\)

a) x - 34 = 0 

=> x = 34

b) x - 16 = 1

=> x = 17

a, x= 34

b, x= 17

(x-34) . 15 = 0

x - 34 = 0

x = 34

b) 18 . (x-16) = 18

x - 16 = 1

x = 17      

a) (x-34)x15=0

    x - 34 =0

   x=34

(x-34)x15=0

x-34=15:0

x-34=0

x     =0+34

x=34

18.(x-16)=18

x-16=18:18

x-16=1

x=1+16

x=17