Question

a first number is 4 less than a second number. Four times the first number is 6 more than twice the second. find the number

Answer 1

f=s-4
4f=2s+6

Does this help?

Answer 2

Hint: s=11

Answer 3

In case you didn't get it,
f=first number
s=second number

Answer 4

replace f=s-4
on 4f=2s+6.

You'll end up with:
4(s-4)=2s+6
just solve it for s :)