Answer:
[tex]6x + 3[/tex]
Step-by-step explanation:
The algebraic expression x + 3 +5x can be simplified by collecting like terms. Like terms are terms that have the same variables. Variables are the alphabets attached (multiplied) with figures. Thus,
[tex]x + 3 + 5x[/tex]
Collect like term
[tex]x + 5x + 3[/tex]
[tex]6x + 3[/tex]