[tex] \frac{1}{3} (7x - 1) = \frac{1}{4} \\ \\ \frac{7x}{3} - \frac{1}{3} = \frac{1}{4} \\ \\ \frac{7x}{3} = \frac{1}{4} + \frac{1}{3} \\ \\ \frac{7x}{3} = \frac{7}{12} \\ \\ 7x = \frac{7 \times 3}{12} \\ \\ 7x = \frac{7}{4} \\ \\ x = \frac{7}{4} \div 7 \\ \\ x = \frac{1}{4} [/tex]
.... Hope this will help....
