Reduce to simplest form. -\dfrac{5}{12}-\left(-\dfrac{9}{3}\right)=− 12 5 ​ −(− 3 9 ​ )=minus, start fraction, 5, divided by, 12, end fraction, minus, left parenthesis, minus, start fraction, 9, divided by, 3, end fraction, right parenthesis, equals