\(\frac{12}{19}\times\frac{38}{5}=\frac{24}{5};\frac{67}{15}+\frac{56}{15}=\frac{41}{5}\)

\(\Rightarrow\frac{24}{5}< x< \frac{41}{5}\)

\(\Rightarrow x\in\left\{5;6;7;8\right\}\)

Vậy x thuộc {5;6;7;8} ...

24/5<x<123/15

72/15<x<123/15

Nếu x là STN thì x=5,6,7,8

bn oi 12+15=27

mik nha cac mik yo quy

27 nha

^{27 nha ban}

=27 nha bạn ơi

tích cho mik nhé

27 nha ban, k minh minh k lai

27 tích cho nình đi

14+15=29 nha bạn

29 

Đúng 100%

Đúng 100%

Đúng 100%

14 + 15  = 29

\(\frac{x+6}{15}=\frac{5-x}{7}\)

\(\Leftrightarrow\left(x+6\right).7=\left(5-x\right).15\)

\(\Leftrightarrow7x+42=75-15x\)

\(\Leftrightarrow7x+15x=75-42\)

\(\Leftrightarrow22x=33\)

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

=> 7.(x+6)= 15.(5-x)

=> 7x +7.6=15.5-15x

=> 7x + 42= 75 -15x

=> 7x+15x=75-42

=> 22x=33

=>x= 1,5

\(\frac{x+6}{15}=\frac{5-x}{7}\)

\(\Rightarrow\frac{x+6}{15}-\frac{5-x}{7}=0\)

\(\Rightarrow\frac{7.\left(x+6\right)}{7.15}+\frac{15.\left(x-5\right)}{7.15}=0\)

\(\Rightarrow\frac{7x+42}{105}+\frac{15x-75}{105}=0\)

\(\Rightarrow\frac{7x+42+15x-75}{105}=0\)

\(\Rightarrow\frac{22x-33}{105}=0\)

\(\Rightarrow22x+33=0\Rightarrow22x=33\)

\(\Rightarrow x=\frac{33}{22}=\frac{3}{2}\)

ý lộn là 46

36 nhé bn tk mk nha mk nhanh nhất

19 + 12 + 15 = 46

(3¹⁵x4+5.3¹⁵):3¹⁵

⁼⁽57395628+71744535):3¹⁵

=129140163:3¹⁵

=9