Hey there!
2/3 * n = 12
2/3n = 12
MULTIPLY 3/2 to BOTH SIDES
3/2n * 2/3 = 12 * 3/2
CANCEL out: 3/2 * 2/3 because it gives you 1
KEEP: 12 * 3/2 because it give the n-value
NEW EQUATION: n = 12 * 3/2
SIMPLIFY IT!
n = 18
Therefore, your answer is: n = 18
Good luck on your assignment & enjoy your day!
~Amphitrite1040:)