You would have to take the following steps to answer this question. 1. 2x + 4 = gx [I just switched the order around for the xg to make it easier] - Subtract gx from both sides. 2. 2x - gx + 4 = 0 - Combine the 2x and gx and subtract 4 from both sides. 3. (2 - g)x = -4 - Divide both sides by 2 - g. 4. x = -4/(2 - g) I hope this helps!