Key points about one- and two-step linear equations ... To solve an equation, inverse operations close inverse operation The opposite of a mathematical process, eg, the inverse of × 5 is ÷ 5.

Jean-Pierre Florens, Joël L. Horowitz, Ingrid Van Keilegom, Bias-Corrected Confidence Intervals in a Class of Linear Inverse Problems, Annals of Economics and Statistics, No. 128 (December 2017), pp.