On the left side use distributive property: 3(n) + (3)(4) = -6 + 15n 3n + 12 = -6 + 15n Subtract 3n: 12 = -6 + 12n Add 6: 18 = 12n Divide 12: 18/12 = n You can simplify it further: n = 3/2 or 1.5
To solve for n, you need to do the numbers in parentheses first. 3(n+4) = 3n + 12. Add 6 to both sides of the equation, so now you have: 3n+18=15n. Subtract 3n from both sides, which isolates n to one side of the equation. You now have 18 = 12n. Divide both sides by 12, which will give you 1.5 = n.
