Hi The rules are the same I. combine Like terms: -23 = 12 - 5t Add a -12 to each side -23 - 12 = -5t -35 = -5t II. Isolate 't ' on one side of the Equation: Multiply each side by 1/-5 -35/-5 = t III. Simplify t = 7 Wish You the Best in your Studies.