Question

resolva equacao 1 grau 2x+3=19

Answer 1

2x + 3 = 19
2x = 19 - 3
2x = 16
x = $\frac{16}{2}$ 
x = 8

Answer 2

Oi, resolução!

$2x+3=19 \\ \\ 2x=19-3 \\ \\ 2x=16 \\ \\ x=16/2 \\ \\ \boxed{x=8}$

S = { 8 }

Bons estudos!