Question

-X + 4 supra 7 X =3

Answer 1

$\frac{-x+4}{7x}=3 \\ -x+4=21x \\ 22x=4 \\ x= \frac{4}{22 \\ x= \frac{2}{11} }$

Answer 2

- x + 4  / 7x = 3 
 - x  + 4 = 7x · 3 
- x  + 4 = 21x 
4 = 21x + x 
22x = 4 
x = 4 /22 
x = 2 /11 ∈ Q