may someone please help me with this ill give brainlyest if i figure out how to

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