Chapter 4 - Proportions, Percents, and Solving Inequalities - Chapters 1-4 Cumulative Review Problem Set - Page 186: 28

{$-2$}

To solve this equation, we will first collect the variable and the constants on the opposite sides of the equality sign. Then, we will perform arithmetic operations on the resultant equation: $3x-4=7x+4$ $3x-7x=4+4$ $-4x=8$ $x=\frac{8}{-4}$ $x=-2$ Therefore, the solution set is {$-2$}.