Respuesta :

Answer: 5

Step-by-step explanation:

5x3+6=21

5x5=25

25-21=4

Let "the number" = [tex]n[/tex]

[tex]6 + 3n = 5n - 4[/tex]

[tex]6 + 3n - 5n = -4[/tex]

[tex]6 - 2n = -4[/tex]

[tex]-2n = -10[/tex]

[tex]n = 5[/tex]

Check my work:

Six added to 3 times (5) is equal to 4 less than 5 times (5)

Six added to 15 is equal to 4 less than 25

21 is equal to 21