Question

two times the sum of a number, x and 9 is at most four times the number. Write and solve an inequality to find to value of the number ​

Answer 1

n ≥ 9

Explanation:

let n = number

2(n + 9) ≤ 4n

2n + 18 ≤ 4n

18 ≤ 2n

9 ≤ n