[tex]( \frac{1}{2} + (x - \frac{4}{5} ) \div 3) \times 10 = 8 \\ ( \frac{1}{2} + \frac{5x - 4}{5} \times \frac{1}{3} ) \times 10 = 8 \\ ( \frac{1}{2} + \frac{5x - 4}{15} ) \times 10 = 8 \\ 5 + \frac{2(5x - 4)}{3} = 8 \\ 5 + \frac{10x - 8}{3} = 8 \\ 15 + 10x - 8 = 24 \\ 7 + 10x = 24 \\ 10x = 24 - 7 \\ 10x = 17 \\ x = \frac{17}{10 } = > x = 1.7[/tex]
[tex]\frac{1}{2} + (x - \frac{1}{2} ) \times 1.5 = 7.5 \\ \frac{1}{2} + (x - \frac{1}{2} ) \times \frac{3}{2} = \frac{3}{4} \\ \frac{1}{2} + \frac{3}{2} x - \frac{3}{2} = \frac{3}{4} \\ - \frac{1}{4} + \frac{3}{2} x = \frac{3}{4} \\ - 1 + 6x = 3 \\ 6x = 3 + 1 \\ 6x = 4 \\ x = \frac{4}{6} \\ x = \frac{2}{3} = > x = 0.(6)[/tex]
