Answer:
its 5
Step-by-step explanation:
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
=x²+3x-4/2x²-5x+3
=(x-1)(x+4)/½(2x-2)(2x-3)
=---------------------------
