Three times the sum of a number and 4 is greater than or equal to 18

Question

Three times the sum of a number and 4 is greater than or equal to 18

Answer 1

I guess your question is: what is the number

3(n + 4) ≥ 18

3n + 12 ≥ 18

3n ≥ 6

n≥ 2

Remember inequalities behave the same way under most arithmetic operations as equations do.  Do you know what one operation works differently and must be remembered?