## Algebra: A Combined Approach (4th Edition)

x = $\frac{5}{21}$
x + $\frac{3}{7}$ = -x + $\frac{1}{3}$ + $\frac{4}{7}$ 2x + $\frac{3}{7}$ = $\frac{1}{3}$ + $\frac{4}{7}$ 2x = $\frac{1}{3}$ + $\frac{1}{7}$ 2x = $\frac{10}{21}$ x = $\frac{5}{21}$