\(13,25:50\%+13,25:0,25+13,25:\dfrac{1}{5}-13,25\)
\(=13,25\times2+13,25\times4+13,25\times5-13,25\times1\)
\(=13,25\times\left(2+4+5-1\right)\)
\(=13,25\times10\)
\(=132,5\)
#AvoidMe

a)

   \(\frac{2}{3}+\frac{1}{3}:x=\frac{3}{5}\)

   \(\frac{1}{3}:x=\frac{3}{5}-\frac{2}{3}\)

    \(\frac{1}{3}:x=\frac{-1}{15}\)

     \(x=\frac{1}{3}:\frac{-1}{15}\)

    \(x=-5\)

b)

     \(\frac{10}{3x}+\frac{67}{4}=-13.25\)

      \(\frac{10}{3x}+\frac{67}{4}=\frac{-53}{4}\)

       \(\frac{10}{3x}=\frac{-53}{4}+\frac{67}{4}\)

       \(\frac{10}{3x}=\frac{7}{2}\)

      \(\Rightarrow10.2=7.3x\)

            \(20=21x\)

            \(x=\frac{20}{21}\)

c)

        x+30%x=-1.3

        x+0.3x=-1.3

        x (1+0.3) = -1.3

        x . 1.3 = -1.3

        x = -1.3 : 1.3

        x = 1

d)

          \(\left(\frac{14}{5x}-50\right):\frac{2}{3}=51\)

           \(\frac{14}{5x}-50=51.\frac{2}{3}\)

             \(\frac{14}{5x}-50=34\)

             \(\frac{14}{5x}=34+50\)

              \(\frac{14}{5x}=84\)

               \(84.5x=14\)

              420x = 14

                   \(x=\frac{1}{30}\)

a, \(\frac{2}{3}+\frac{1}{3}:x=\frac{3}{5}\)

=> \(\frac{1}{3}:x=\frac{3}{5}-\frac{2}{3}\)

=>\(\frac{1}{3}:x=\frac{-1}{15}\)

=> \(x=\frac{1}{3}:\frac{-1}{15}\)

=> \(x=\frac{-1}{5}\)

mình sai chỗ kết quả cuối bằng -5 nhé

13,25 x (0,5+0,25+0,125+6)=91,09375

13,25*0,5+13,25*0,25+13,25*0,25

=13,25*(0,5+0,25+0,25)

=13,25*1

=13,25

\(13,25\times0,5+13,25\times0,25+13,25\times0,25\)

\(=13,25\times\left(0,5+0,25+0,25\right)\)

\(=13,25\times1=13,25\)

= 13,25 x 2 + 13,25 x 4 + 13,25 x 8 + 13,25 x 6

= 13,25 x ( 2+4+8+6)

= 13,25 X 20

=265

13,25 : 0,5 + 13,25 : 0,5 + 13,25 : 0,125 + 13,25 x 6
= 13,25 x 2 + 13,25 x 2 + 13,25 x 8 + 13,25 x 6
= 13,25 x ( 2 + 2 + 8 +6 )
= 13,25 x 18
= 238,5

13,25 :  0,5 + 13,25 : 0,5 + 13,25 : 0,125 + 13,25 x 6=238.5

a. \(3\dfrac{1}{3}x+16=13,25\)

=> x + 16 = 13,25

=> x = 13,25 - 16

=> x = \(-\dfrac{11}{4}\)

b. x - 43 = (57 - x) - 50

=> 2x = 57 - 50 + 43

=> 2x = 7 + 43

=> 2x = 50

=> x = 50 : 2

=> x = 25

a, \(3\dfrac{1}{3}x\) + 16 = 13,25

\(\dfrac{10}{3}x\) + 16 = 13,25

\(\dfrac{10}{3}x\) = -2,75

x = -2,75 : \(\dfrac{10}{3}\)

x = -\(\dfrac{33}{40}\)

b, x - 43 = ( 57 - x ) - 50

x - 43 = 57 - x - 50

x + x = 57 - 50 + 43

2x = 50

x = 25

a,\(3\dfrac{1}{3}x+16=13,25\)

\(\Rightarrow\dfrac{10}{3}x+16=\dfrac{53}{4}\)

\(\Rightarrow\dfrac{10}{3}x=\dfrac{53}{4}-16\)

\(\Rightarrow\dfrac{10}{3}x=-\dfrac{11}{4}\)

\(\Rightarrow x=-\dfrac{11}{4}\div\dfrac{10}{3}\)

\(\Rightarrow x=-\dfrac{33}{40}\)

vậy x\(=-\dfrac{33}{40}\)

C

đáp án \(C.132,5\)

c nha