9 subtracted from the product of 3 and a number is greater than or equal to 16 The phrase a number means an arbitrary variable, let's call it x The product of 3 and a number means we multiply 3 times x: 3x 9 subtracted from the product: 3x - 9 The phrase is greater than or equal to means an inequality. So we set up an inequality with >= for the greater than or equal to sign in relation to 3x - 9 and 16 Our algebraic expression (inequality) becomes: 3x - 19 >= 16