You're on the right track. Start by combining like terms on the left side of the equation by adding 56 and 34.
90 = n + 30, now subtract 30 from both sides of the equation to isolate the variable n.
60 = n is the answer.
56 + 34 = n + 30
90 = n + 30 added like terms on the left side (56 + 34)
-30 -30 subtracted 30 from both sides to isolate n
60 = n
