[tex]5 + 3x = 76[/tex]
[tex]3x = 76 - 5[/tex]
[tex]3x = 71[/tex]
[tex]x = \frac{71}{3} [/tex]
Comprobación:
[tex]5 + 3 \times \frac{71}{3} = 76[/tex]
[tex]5 + 71 = 76[/tex]
[tex]76 = 76[/tex]
