Resposta:
OLÁ
A)
[tex]x + 5 = 8 \\ x = 8 - 5 \\ \blue{x = 3}[/tex]
B)
[tex]x - 4 = 3 \\ x = 3 + 4 \\ \blue{x = 7}[/tex]
C)
[tex]3x = 15 \\ x = \frac{15}{3} \\ \\ \blue{x = 5} [/tex]
D)
[tex]2x = 14 \\ x = \frac{14}{2} \\ \\ \blue{x = 7} [/tex]
espero ter ajudado
