Question

Twice the number n is no less than 10 units from -1

Answer 1

This means that 2n is equal to or greater than -1 +10 or -1-10, which can be shown as 2n ≥ 9 and 2n ≥-11, and since 2n ≥11 encompasses both, we can therefore say  2n ≥-11 or n ≥ -5.5 by dividing both sides by 2