Question

How do I solve 3n + 4 = 7

Answer 1

3n + 4 = 7
      -4     -4
  3n = 3
divide both sides by 3
n=1

Answer 2

3n + 4 = 7
3n + 4 (-4) = 7 (-4)
3n = 3
3n/3 = 3/3

n = 1

hope this helps