Question

1 1/3x -1=12/9 помогите решить

Answer 1

4/3X = 12/9 + 9/9 
4/3X = 21/9 
12X = 21 
X = 21/12 
X = 1 9/12 

Answer 2

$1 frac{1}{3} x-1= frac{12}{9} \ \ frac{4}{3}x= frac{12}{9} +1 \ \ frac{4}{3} x= frac{21}{9} = frac{7}{3} \ \ x= frac{7}{3}* frac{3}{4} = frac{7}{4}$