Question

Resolva a equaçao do primeiro grau 13x - 23 -45 = 7x + 12

Answer 1

13x - 23 - 45 = 7x+12
13x - 7x = 45+12+23   obs : isolando as incógnitas.
6x=80
x = $\frac{80}{6} = simplificando por 2 = \frac{40}{3}$

Answer 2

13x - 23 - 45 = 7x + 12
13x - 68 = 7x + 12
13x - 7x = 12 + 68
6x = 80
x = 80/6
x = 40/3