35 added to n is greater than or equal to the sum of k and 21 Take this algebraic expression in 3 parts: 35 added to n means we have a sum: n + 35 The sum of k and 21 means we add 21 to k: k +21 The phrase greater than or equal to means an inequality using this sign (>=), so we write this as follows: n + 35 >= k + 21