Question

Inequação: x + 3 < 3x + 4

Answer 1

x + 3 < 3x + 4 

x - 3x < 4 - 3 

- 2x < 1  (-1)

2x > - 1

x > - 1 / 2

Answer 2

Olá!

$\\ \displaystyle \mathsf{x + 3 < 3x + 4} \\\\ \mathsf{x - 3x < 4 - 3} \\\\ \mathsf{- 2x < 1} \\\\ \mathsf{2x > - 1} \\\\ \boxed{\mathsf{x > - \frac{1}{2}}}$