[tex]c) \frac{2}{5}x = \frac{4}{15} \\ \\ \frac{2x}{5} = \frac{4}{15} \\ \\ 2x = \frac{4}{15} \times 5 \\ \\ 2x = \frac{20}{15} \\ \\ 2x = \frac{4}{3} \\ \\ x = \frac{ \frac{4}{3} }{2} \\ \\ x = \frac{4}{3 \times 2} \\ \\ x = \frac{4}{6} \\ \\ x = \frac{2}{3} [/tex]
[tex]d) \frac{3}{5}x + \frac{1}{2} = \frac{7}{8} \\ \\ \frac{3x}{5} + \frac{1}{2} = \frac{7}{8} \\ \\ \frac{3x}{5} = \frac{7}{8} - \frac{1}{2} \\ \\ \frac{3x}{5} = \frac{3}{8} \\ \\ 3x = \frac{3}{8} \times 5 \\ \\ 3x = \frac{15}{8} \\ \\ x = \frac{ \frac{15}{8} }{3} \\ \\ x = \frac{15}{8 \times 3} \\ \\ x = \frac{15}{24} \\ \\ x = \frac{5}{8} [/tex]
