Hey there!
2n + 5 = 9
SUBTRACT 5 to BOTH SIDES
2n + 5 - 5 = 9 - 5
CANCEL out: 5 - 5 because it gives you 0
KEEP: 9 - 5 because it help solve for the n-value
NEW EQUATION: 2n = 9 - 5
SIMPLIFY IT!
2n = 4
DIVIDE 2 to BOTH SIDES
2n/2 = 4/2
CANCEL out: 2/2 because it give you 1
KEEP: 4/2 because it give you the n-value
NEW EQUATION: n = 4/2
SIMPLIFY IT!
n = 2
Therefore, your answer is: n = 2
Good luck on your assignment & enjoy your day!
~Amphitrite1040:)