The document discusses rewriting formulas and solving equations. It provides two examples: 1) finding the value of w when f(w) = 113, and 2) finding the values of x and z when y = 2 based on the equation y = 3x + 4z. For the first example, it rewrites the formula for f(w) and isolates w, obtaining w = 17. For the second example, it has not yet solved for x when y = 2 and z = 3 or solved for z when y = 2 and x = 3.